user_query: Yes.
response_text: OK, I made a list called "Kroger" and added green beans and garlic.
user_query: Kroger
response_text: I couldn't find a list called "Kroger." Do you want me to make one?
user_query: Put green beans and garlic on the list.
response_text: OK. Which list do you want to add to?
User: I don't need my 5pm, no 5:30pm ride.
Parse: Cancel_ride ( pickup_time « 5:30pm » )