user_query: christmas list
response_text: You have one thing on that list.
user_query: add ice cram
response_text: Got it, I added ice cream.
user_query: nevermind that. add to grocery list instead
response_text: Sure, I changed the list title to "Grocery."
User: I need to cancel my um trip to Galveston from um Houston on uh Uber.
Parse: Cancel_ride ( dropoff_location « Galveston » pickup_location « Houston » provider « Uber » )