diff --git a/convlab2/util/multiwoz/dbquery.py b/convlab2/util/multiwoz/dbquery.py
index a276b8a473af57cec3ec51ce5554efd23b01269b..4830878633fce933d2b4cad6c27fde50d905f822 100755
--- a/convlab2/util/multiwoz/dbquery.py
+++ b/convlab2/util/multiwoz/dbquery.py
@@ -54,7 +54,7 @@ class Database(object):
                         elif ignore_open and key in ['destination', 'departure']:
                             continue
                         else:
-                            if val.strip().lower() != record[key].strip().lower():
+                            if val.strip() != record[key].strip():
                                 break
                     except:
                         continue