user_query: delete grapes from list
response_text: I couldn't find grapes.
user_query: add grapes to my recipe list
response_text: Alright, I added grapes.
user_query: add grapes to my list
response_text: OK. Which list do you want to add to?
User: I need a ride back to the hotel.
Parse: Order_ride ( dropoff_location « hotel » )