user_query: put makeup on the list
response_text: OK. Which list do you want to add to?
user_query: to do
response_text: Got it, I added makeup.
user_query: take it back off
response_text: Which list?
user_query: to fdo
response_text: Which list?
User: I want to buy 3 tickets, actually 4 tickets to the Twenty One Pilots concert.
Parse: BuyEventTickets ( event_performer « Twenty One Pilots » event_type « concert » ticket_quantity « 4 » )