diff --git a/convlab/dst/rule/multiwoz/dst.py b/convlab/dst/rule/multiwoz/dst.py
index eb7d31cf4d5fd59089164210a08c2bf10e51b6ad..57e438a88e8c214b995acbab7fec1210b4f63e5e 100755
--- a/convlab/dst/rule/multiwoz/dst.py
+++ b/convlab/dst/rule/multiwoz/dst.py
@@ -70,82 +70,88 @@ if __name__ == '__main__':
 
     dst = RuleDST()
 
-    # Action is a dict. Its keys are strings(domain-type pairs, both uppercase and lowercase is OK) and its values are list of lists.
-    # The domain may be one of ('Attraction', 'Hospital', 'Booking', 'Hotel', 'Restaurant', 'Taxi', 'Train', 'Police').
-    # The type may be "inform" or "request".
-
-    # For example, the action below has a key "Hotel-Inform", in which "Hotel" is domain and "Inform" is action type.
-    # Each list in the value of "Hotel-Inform" is a slot-value pair. "Area" is slot and "east" is value. "Star" is slot and "4" is value.
+    # Action (dialog acts) is a list of (intent, domain, slot, value) tuples.
+    # RuleDST will only handle `inform` and `request` actions
     action = [
-        ["Inform", "Hotel", "Area", "east"],
-        ["Inform", "Hotel", "Stars", "4"]
+        ["inform", "hotel", "area", "east"],
+        ["inform", "hotel", "stars", "4"]
     ]
 
     # method `update` updates the attribute `state` of tracker, and returns it.
     state = dst.update(action)
     assert state == dst.state
-    assert state == {'user_action': [],
-                     'system_action': [],
-                     'belief_state': {'police': {'book': {'booked': []}, 'semi': {}},
-                                      'hotel': {'book': {'booked': [], 'people': '', 'day': '', 'stay': ''},
-                                                'semi': {'name': '',
-                                                         'area': 'east',
-                                                         'parking': '',
-                                                         'pricerange': '',
-                                                         'stars': '4',
-                                                         'internet': '',
-                                                         'type': ''}},
-                                      'attraction': {'book': {'booked': []},
-                                                     'semi': {'type': '', 'name': '', 'area': ''}},
-                                      'restaurant': {'book': {'booked': [], 'people': '', 'day': '', 'time': ''},
-                                                     'semi': {'food': '', 'pricerange': '', 'name': '', 'area': ''}},
-                                      'hospital': {'book': {'booked': []}, 'semi': {'department': ''}},
-                                      'taxi': {'book': {'booked': []},
-                                               'semi': {'leaveAt': '',
-                                                        'destination': '',
-                                                        'departure': '',
-                                                        'arriveBy': ''}},
-                                      'train': {'book': {'booked': [], 'people': ''},
-                                                'semi': {'leaveAt': '',
-                                                         'destination': '',
-                                                         'day': '',
-                                                         'arriveBy': '',
-                                                         'departure': ''}}},
+    assert state == {'belief_state': {'attraction': {'area': '', 'name': '', 'type': ''},
+                                      'hospital': {'department': ''},
+                                      'hotel': {'area': 'east',
+                                                'book day': '',
+                                                'book people': '',
+                                                'book stay': '',
+                                                'internet': '',
+                                                'name': '',
+                                                'parking': '',
+                                                'price range': '',
+                                                'stars': '4',
+                                                'type': ''},
+                                      'restaurant': {'area': '',
+                                                     'book day': '',
+                                                     'book people': '',
+                                                     'book time': '',
+                                                     'food': '',
+                                                     'name': '',
+                                                     'price range': ''},
+                                      'taxi': {'arrive by': '',
+                                               'departure': '',
+                                               'destination': '',
+                                               'leave at': ''},
+                                      'train': {'arrive by': '',
+                                                'book people': '',
+                                                'day': '',
+                                                'departure': '',
+                                                'destination': '',
+                                                'leave at': ''}},
+                     'booked': {},
+                     'history': [],
                      'request_state': {},
+                     'system_action': [],
                      'terminated': False,
-                     'history': []}
+                     'user_action': []}
 
     # Please call `init_session` before a new dialog. This initializes the attribute `state` of tracker with a default state, which `convlab.util.multiwoz.state.default_state` returns. But You needn't call it before the first dialog, because tracker gets a default state in its constructor.
     dst.init_session()
-    action = [["Inform", "Train", "Arrive", "19:45"]]
+    action = [["inform", "train", "arrive by", "19:45"]]
     state = dst.update(action)
-    assert state == {'user_action': [],
-                     'system_action': [],
-                     'belief_state': {'police': {'book': {'booked': []}, 'semi': {}},
-                                      'hotel': {'book': {'booked': [], 'people': '', 'day': '', 'stay': ''},
-                                                'semi': {'name': '',
-                                                         'area': '',
-                                                         'parking': '',
-                                                         'pricerange': '',
-                                                         'stars': '',
-                                                         'internet': '',
-                                                         'type': ''}},
-                                      'attraction': {'book': {'booked': []},
-                                                     'semi': {'type': '', 'name': '', 'area': ''}},
-                                      'restaurant': {'book': {'booked': [], 'people': '', 'day': '', 'time': ''},
-                                                     'semi': {'food': '', 'pricerange': '', 'name': '', 'area': ''}},
-                                      'hospital': {'book': {'booked': []}, 'semi': {'department': ''}},
-                                      'taxi': {'book': {'booked': []},
-                                               'semi': {'leaveAt': '',
-                                                        'destination': '',
-                                                        'departure': '',
-                                                        'arriveBy': ''}},
-                                      'train': {'book': {'booked': [], 'people': ''},
-                                                'semi': {'leaveAt': '',
-                                                         'destination': '',
-                                                         'day': '',
-                                                         'arriveBy': '19:45',
-                                                         'departure': ''}}},
+    assert state == {'belief_state': {'attraction': {'area': '', 'name': '', 'type': ''},
+                                      'hospital': {'department': ''},
+                                      'hotel': {'area': '',
+                                                'book day': '',
+                                                'book people': '',
+                                                'book stay': '',
+                                                'internet': '',
+                                                'name': '',
+                                                'parking': '',
+                                                'price range': '',
+                                                'stars': '',
+                                                'type': ''},
+                                      'restaurant': {'area': '',
+                                                     'book day': '',
+                                                     'book people': '',
+                                                     'book time': '',
+                                                     'food': '',
+                                                     'name': '',
+                                                     'price range': ''},
+                                      'taxi': {'arrive by': '',
+                                               'departure': '',
+                                               'destination': '',
+                                               'leave at': ''},
+                                      'train': {'arrive by': '19:45',
+                                                'book people': '',
+                                                'day': '',
+                                                'departure': '',
+                                                'destination': '',
+                                                'leave at': ''}},
+                     'booked': {},
+                     'history': [],
                      'request_state': {},
+                     'system_action': [],
                      'terminated': False,
-                     'history': []}
+                     'user_action': []}