user_query: add chocolate to Valentine's Day list
response_text: I couldn't find a list called "Valentine's Day." Do you want me to make one?
user_query: yes
response_text: Sure, I made a list called "Valentine's Day" and added chocolate.
user_query: you know what take chocolate off that list and put it on anniversary list instead
response_text: I couldn't find a list called "Anniversary."
User: cancel my Lyft, umm, Uber ride
Parse: Cancel_ride ( provider « Uber » )