Update app.py

app.py

@@ -41,7 +41,7 @@ def chat(
     history_messages = state
     if history_messages == None:
         history_messages = []
-        history_messages.append({"role": "system", "content":"A helpful assistant."})
+        history_messages.append({"role": "system", "content":"用中文回答问题"})
 
     history_messages.append({"role": "user", "content": message})
     # We have no content for the assistant's response yet but we will update this: