user_query: I wanna add an item to the Camping Supplies list.
response_text: What do you want to add?
user_query: marshmallows
response_text: I couldn't find a list called "Camping Supplies." Do you want me to make one?
user_query: Okay
response_text: Sure, I made a list called "Camping Supplies" and added marshmallows.
User: Get my um Bank of America balance for January.
Parse: Get_bill ( account_provider « Bank of America » billing_date_span « January » )