user_query: create a new list
response_text: OK, what do you want to call it?
user_query: Amazon
response_text: OK, I made a list called "Amazon".
user_query: add dog food and ice to Amazon list
response_text: Got it. Dog food and ice on your list called "Amazon". Anything else?
User: Let's buy some tickets tickets to see the Giants.
Parse: BuyEventTickets ( event_performer « Giants » )