user_query: Could you create a list for me named Things to buy
response_text: Sorry, it looks like you already have a list with that name. Do you still want to make a new one?
user_query: Add toothpaste and hand sanitizer on it
response_text: OK, I added those two things.
user_query: peanut butter and bread
response_text: Got it, what do you want to call it?
User: What do we owe Verizon from last month?
Parse: Get_bill ( account_provider « Verizon » billing_date_span « last month » )