user_query: Add UFC fighter to my list
response_text: OK. Which list do you want to add to?
user_query: My potential careers list
response_text: I couldn't find a list called "Potential Careers." Do you want me to make one?
User: I'll need to cancel the Lyft I had scheduled for 7am tomorrow.
Parse: Cancel_ride ( pickup_time « 7am tomorrow » provider « Lyft » )