Update app.py

app.py

@@ -204,7 +204,7 @@ def question_answer(url, file, question, openAI_key, model):
 answer = gr.Chatbot(label='The answer to your question is :', placeholder='Type your question and press enter')
 
 # define gr.Chatbox for question
-question = gr.Chatbot(placeholder='Enter your question here', label='Enter your question here', message_pairs=[[USER_NAME, '']])
+question = gr.Chatbot(placeholder='Enter your question here', label='Enter your question here', message_pairs=[['User', '']])