Update app.py

app.py

@@ -116,7 +116,7 @@ def upload_pdf(pdf_file):
 
 def respond(message, history):
     bot_message = pdf_chatbot.chat(message)
-    history.append((f"User: {message}", f"Bot: {bot_message}"))
+    history.append((message, bot_message))
     return "", history
 
 def clear_chatbot():