user_query: Please add something to one of my lists
response_text: Got it. Which list do you want to add to?
user_query: Walmart
response_text: What do you want to add?
user_query: Batteries
response_text: I couldn't find a list called "Walmart." Do you want me to make one?
user_query: Yes
response_text: Alright, I made a list called "Walmart" and added Batteries.
user_query: Actually I don't mean batteries 
response_text: What do you want to call it instead?
User: Get Garth Brooks tickets.
Parse: BuyEventTickets ( event_performer « Garth Brooks » )