user_query: Add an item to the Necessities list.
response_text: What do you want to add?
user_query: toilet tissue
response_text: I couldn't find a list called "Necessities." Do you want me to make one?
user_query: Sounds good
response_text: Got it, I made a list called "Necessities" and added toilet tissue.
User: Please cancel my Uber ride to the beach.
Parse: Cancel_ride ( dropoff_location « beach » provider « Uber » )