diff --git a/data/unified_datasets/multiwoz21/README.md b/data/unified_datasets/multiwoz21/README.md
index 7bf47f2c79ba03faa21fe9d03b4bc8a6e0c89ed8..d8fbcf9b5b5fed37728cbe63f97c0c28b222fc1d 100644
--- a/data/unified_datasets/multiwoz21/README.md
+++ b/data/unified_datasets/multiwoz21/README.md
@@ -18,6 +18,7 @@ MultiWOZ 2.1 fixed the noise in state annotations and dialogue utterances. It al
   - Normalize slot name and value. See `normalize_domain_slot_value` function in `preprocess.py`.
   - Correct some non-categorical slots' values and provide character level span annotation.
   - Concatenate multiple values in user goal & state using `|`.
+  - Add `booked` information in system turns from original belief states.
 - **Annotations:**
   - user goal, dialogue acts, state.
 
diff --git a/data/unified_datasets/multiwoz21/data.zip b/data/unified_datasets/multiwoz21/data.zip
index 9bb5c40b6c58e821c306f7096a07d594f2e59f47..6f8fc9f7d43f8a10ae37d8de54b34bd95ca4554b 100644
Binary files a/data/unified_datasets/multiwoz21/data.zip and b/data/unified_datasets/multiwoz21/data.zip differ
diff --git a/data/unified_datasets/multiwoz21/dummy_data.json b/data/unified_datasets/multiwoz21/dummy_data.json
index 9945b92915b0f9739d8b31b3fd112f8ab86f2cb3..9009018f77d201baf284e4f80459a4f99814fa7a 100644
--- a/data/unified_datasets/multiwoz21/dummy_data.json
+++ b/data/unified_datasets/multiwoz21/dummy_data.json
@@ -111,7 +111,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -210,7 +217,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -317,7 +331,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -405,7 +426,19 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [
+            {
+              "name": "the cambridge belfry",
+              "reference": "7GAWK763"
+            }
+          ],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -482,7 +515,19 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [
+            {
+              "name": "the cambridge belfry",
+              "reference": "7GAWK763"
+            }
+          ],
+          "attraction": [],
+          "train": []
+        }
       }
     ]
   },
@@ -602,7 +647,14 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -689,7 +741,14 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -759,7 +818,14 @@
           "non-categorical": [],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -836,7 +902,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -912,7 +985,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       }
     ]
   },
@@ -1053,7 +1133,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -1132,7 +1219,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -1234,7 +1328,14 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -1315,7 +1416,19 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR4977",
+              "reference": "A9NHSO9Y"
+            }
+          ]
+        }
       },
       {
         "speaker": "user",
@@ -1400,7 +1513,19 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR4977",
+              "reference": "A9NHSO9Y"
+            }
+          ]
+        }
       },
       {
         "speaker": "user",
@@ -1470,7 +1595,19 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR4977",
+              "reference": "A9NHSO9Y"
+            }
+          ]
+        }
       },
       {
         "speaker": "user",
@@ -1566,7 +1703,24 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [
+            {
+              "name": "the cambridge belfry",
+              "reference": "5NAWGJDC"
+            }
+          ],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR4977",
+              "reference": "A9NHSO9Y"
+            }
+          ]
+        }
       },
       {
         "speaker": "user",
@@ -1643,7 +1797,24 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [
+            {
+              "name": "the cambridge belfry",
+              "reference": "5NAWGJDC"
+            }
+          ],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR4977",
+              "reference": "A9NHSO9Y"
+            }
+          ]
+        }
       }
     ]
   },
@@ -1740,7 +1911,14 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -1847,7 +2025,14 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -1924,7 +2109,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -1994,7 +2186,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       }
     ]
   },
@@ -2124,7 +2323,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -2222,7 +2428,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -2326,7 +2539,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -2419,7 +2639,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -2536,7 +2763,14 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -2633,7 +2867,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -2729,7 +2970,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -2833,7 +3081,19 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR5626",
+              "reference": "7ZCVR4Q3"
+            }
+          ]
+        }
       },
       {
         "speaker": "user",
@@ -2910,7 +3170,19 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR5626",
+              "reference": "7ZCVR4Q3"
+            }
+          ]
+        }
       }
     ]
   },
@@ -3039,7 +3311,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3135,7 +3414,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
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       {
         "speaker": "user",
@@ -3229,7 +3515,14 @@
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           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3377,7 +3670,14 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3469,7 +3769,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3577,7 +3884,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3647,7 +3961,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3724,7 +4045,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3811,7 +4139,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3905,7 +4240,19 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [
+            {
+              "name": "acorn guest house",
+              "reference": "04CSEO7Q"
+            }
+          ],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -3982,7 +4329,19 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [
+            {
+              "name": "acorn guest house",
+              "reference": "04CSEO7Q"
+            }
+          ],
+          "attraction": [],
+          "train": []
+        }
       }
     ]
   },
@@ -4112,7 +4471,14 @@
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           ]
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-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
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       {
         "speaker": "user",
@@ -4206,7 +4572,14 @@
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           "binary": []
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-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
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       {
         "speaker": "user",
@@ -4292,7 +4665,14 @@
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           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
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       {
         "speaker": "user",
@@ -4393,7 +4773,14 @@
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-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
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       {
         "speaker": "user",
@@ -4531,7 +4918,14 @@
           ],
           "binary": []
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-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
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       {
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@@ -4637,7 +5031,14 @@
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           ]
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-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
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       {
         "speaker": "user",
@@ -4720,7 +5121,14 @@
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         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       }
     ]
   },
@@ -4821,7 +5229,14 @@
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-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
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       {
         "speaker": "user",
@@ -4900,7 +5315,14 @@
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           "binary": []
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-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "restaurant": [],
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+          "attraction": [],
+          "train": []
+        }
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       {
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@@ -4977,7 +5399,14 @@
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-        "db_results": {}
+        "db_results": {},
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+          "attraction": [],
+          "train": []
+        }
       }
     ]
   },
@@ -5127,7 +5556,14 @@
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-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "attraction": [],
+          "train": []
+        }
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       {
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@@ -5231,7 +5667,14 @@
           ],
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+        "db_results": {},
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+          "train": []
+        }
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@@ -5339,7 +5782,14 @@
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           ]
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-        "db_results": {}
+        "db_results": {},
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+          "attraction": [],
+          "train": []
+        }
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       {
         "speaker": "user",
@@ -5474,7 +5924,19 @@
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           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR1879",
+              "reference": "XU1QLHVW"
+            }
+          ]
+        }
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@@ -5609,7 +6071,19 @@
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         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
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+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR1879",
+              "reference": "XU1QLHVW"
+            }
+          ]
+        }
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         "speaker": "user",
@@ -5692,7 +6166,19 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": [
+            {
+              "trainID": "TR1879",
+              "reference": "XU1QLHVW"
+            }
+          ]
+        }
       }
     ]
   },
@@ -5800,7 +6286,14 @@
           ],
           "binary": []
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       },
       {
         "speaker": "user",
@@ -5889,7 +6382,14 @@
             }
           ]
         },
-        "db_results": {}
+        "db_results": {},
+        "booked": {
+          "taxi": [],
+          "restaurant": [],
+          "hotel": [],
+          "attraction": [],
+          "train": []
+        }
       }
     ]
   }
diff --git a/data/unified_datasets/multiwoz21/preprocess.py b/data/unified_datasets/multiwoz21/preprocess.py
index 19a1634a434bd7118a035d4474114d704ce1acd0..d870026ab6ea77b8cc2c7e497d7980b1e950a41d 100644
--- a/data/unified_datasets/multiwoz21/preprocess.py
+++ b/data/unified_datasets/multiwoz21/preprocess.py
@@ -860,17 +860,23 @@ def preprocess():
                 # add empty db_results
                 turn_state = turn['metadata']
                 cur_state = copy.deepcopy(init_ontology['state'])
+                booked = {}
                 for domain in turn_state:
                     if domain not in cur_state:
                         continue
                     for subdomain in ['semi', 'book']:
                         for slot, value in turn_state[domain][subdomain].items():
-                            if slot in ['booked', 'ticket']:
+                            if slot == 'ticket':
+                                continue
+                            elif slot == 'booked':
+                                assert domain in init_ontology['domains']
+                                booked[domain] = value
                                 continue
                             _, slot, value = normalize_domain_slot_value(domain, slot, value)
                             cur_state[domain][slot] = value
                 dialogue['turns'][-2]['state'] = cur_state
                 dialogue['turns'][-1]['db_results'] = {}
+                dialogue['turns'][-1]['booked'] = booked
         dialogues_by_split[split].append(dialogue)
     # pprint(cnt_domain_slot.most_common())
     dialogues = []
@@ -883,8 +889,8 @@ def preprocess():
     with ZipFile('data.zip', 'w', ZIP_DEFLATED) as zf:
         for filename in os.listdir(new_data_dir):
             zf.write(f'{new_data_dir}/{filename}')
-    rmtree(original_data_dir)
-    rmtree(new_data_dir)
+    # rmtree(original_data_dir)
+    # rmtree(new_data_dir)
     return dialogues, init_ontology
 
 if __name__ == '__main__':