user_query: can you create a todo list for me
response_text: Alright, I made a list called "Todo".
user_query: Put take care of business, call Joe, talk to Mark and buy groceries on it
response_text: I couldn't find a list called "Business, Call Joe, Talk To Mark And Buy Groceries." Do you want me to make one?
user_query: no   Put some items on this list for me
response_text: Sure, I made a list called "Business, Call Joe, Talk To Mark And Buy Groceries" and added those two things.
User: put Metallica on the movies list
Parse: Add_item_to_list ( items « Metallica » list_label « movies » list_singular_or_plural « list » )