Update app.py

app.py

@@ -11,7 +11,9 @@ def respond(message, history):
 
 # add all previous messages to the messages list
     if history:
-        messages.extend(history)
+        for user_msg, assistant_msg in history:
+            messages.append({"role": "user", "content": user_msg})
+            messages.append({"role": "assistant", "content": assistant_msg})
 
     # add the current user's message to the messages list
     messages.append({"role": "user", "content": message})