fixed user input for retry logic

app.py

@@ -165,13 +165,13 @@ def retry_last_answer(
     if chatbot and history:
         # Removing the previous conversation from chat 
         chatbot.pop(-1)
-        # Removing bot response from the history 
-        history.pop(-1)
         #history[-1] = (history[-1][0],)
         # Setting up a flag to capture a retry 
         RETRY_FLAG = True
         # Getting last message from user
         user_input = history[-1][0]
+        # Removing bot response from the history 
+        history.pop(-1)
 
         print(f"popped chatbot is - {chatbot}") 
         print(f"popped history is - {history}")