user_query: please create a favorite days list
response_text: Sure, I made a list called "Favorite Days".
user_query: add Halloween to my list
response_text: OK. Halloween on your list called "Favorite Days". Anything else?
user_query: Thanksgiving
response_text: OK. Thanksgiving. Anything else?
user_query: nope
response_text: OK, your list is updated.
User: I want to see my um cell phone bill from last month
Parse: Get_bill ( account_type « cell phone » billing_date_span « last month » )