Update app.py

app.py

@@ -50,11 +50,11 @@ def generate_response(user_input, chat_history):
             chat_session = model.start_chat()
 
             # Format the history for the model
-            formatted_history = "\n".join([f"{role}: {msg}" for role, msg in chat_history])
+            formatted_history = "\n".join([f"{msg}" for role, msg in chat_history])
             response = chat_session.send_message(formatted_history)
 
             # Append the assistant's response to history
-            chat_history.append(("assistant", response.text))
+            chat_history.append((response.text))
             return chat_history
 
         except Exception as e: