user_query: create a new list
response_text: OK, what do you want to call it?
user_query: Amazon
response_text: OK, I made a list called "Amazon".
user_query: add dog food and ice to Amazon list
response_text: Got it. Dog food and ice on your list called "Amazon". Anything else?
User: move ice from Amazon list to Camping list
Parse: Add_item_to_list ( items « ice » list_label « Camping » list_singular_or_plural « list » )