user_query: Create a list for me called Costco shopping
response_text: OK, I made a list called "Costco Shopping".
user_query: put lettuce, apples, bananas, cauliflower, meat, chicken, cheese and flour on it
response_text: Got it. Lettuce, apples, bananas, cauliflower, meat, chicken, cheese and flour on your list called "Costco Shopping". Anything else?
user_query: add towels
response_text: Sure. Towels. Anything else?
user_query: toilet paper
response_text: Toilet paper. Got it. What else?
User: Find out the current week charges are on my HELOC, change that to last week's charges.
Parse: Get_bill ( account_provider « HELOC » billing_date_span « last week » )