user_query: take bacon off the grocery list
response_text: I couldn't find bacon on your list called "Grocery."
user_query: create a grocery list and add cheese, ham, bacon to the list
response_text: Alright, I made a list called "Grocery" and added those three things.
User: Order an XL ice cream from icey groove
Parse: Order_menu_item ( menu_item « ice cream » restaurant « icey groove » size « XL » )