user_query: Add to list
response_text: Alright. Which list do you want to add to?
user_query: Movies
response_text: What do you want to add?
user_query: Add to music list instead
response_text: What do you want to add?
User: Cancel my trip from Homewood to Hoover.
Parse: Cancel_ride ( dropoff_location « Hoover » pickup_location « Homewood » )