user_query: onion, chili
response_text: OK, I added onion, chili.
user_query: Groceries
response_text: What do you want to add?
user_query: Please include some items on my initial list.
response_text: Alright. Which list do you want to add to?
User: Check the status of order ABC123, oops, number ABC321.
Parse: Check_order_status ( order_number « ABC321 » )