Update app.py

app.py

@@ -40,7 +40,7 @@ def respond(message, chat_history):
     bot_message = qa({"question": message, "chat_history": chat_history})
     chat_history = [(message, bot_message["answer"])]
     time.sleep(1)
-    return "", chat_history
+    return chat_history
 
 with gr.Blocks() as demo:
     with gr.Tab("OpenAI API Key Submission"):