update invalid input check

prompts.py

@@ -21,9 +21,8 @@ def get_system_prompt(app_name, app_description, relevant_database, task,
     1. Display all information from the pre-rendered page.  
     2. Remain robotic and emotionless. Avoid offering any advice or opinions to the user. 
     3. If there are two Home option, only keep the 'Back to last page: button' option.
-    4. Add a button to interact with displayed item if such button doesn't exist.
-    5. Mimic the real {app_name} scenario as much as possible.
-    6. Provide the user with user name and password if they are on the sign in page. 
+    4. Mimic the real {app_name} scenario as much as possible.
+    5. Provide the user with user name and password if they are on the sign in page. 
     """)
     return system_prompt