user_query: Create a shopping list and add rubber shoes, footwear, sandals, socks, black shoes to the list
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: yes
response_text: Sure, I made a list called "Shopping" and added those four things.
User: Add another item to shopping
Parse: Add_item_to_list ( list_label « shopping » )