user_query: Could you create a list for me named Costco
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 pears and bananas on it
response_text: Got it, I added pears and bananas.
user_query: apples
response_text: Alright, what do you want to call it?
user_query: berries
response_text: Sure, I made a list called "Berries" and added apples.
user_query: bread
response_text: Got it, what do you want to call it?
User: let's get the cost this month
Parse: Get_bill ( billing_date_span « this month » )