user_query: add something to my school list
response_text: What do you want to add?
user_query: actually add it to my shopping list
response_text: What do you want to add?
user_query: shirts
response_text: I couldn't find a list called "School." Do you want me to make one?
User: Pay $50, no, $70 off my health insurance bill.
Parse: Pay_bill ( payment_amount « $70 » service_type « health insurance » )