user_query: I want to remove onions off my shopping list 
response_text: Sure, I deleted onions.
user_query: I want to add onions to my shopping list 
response_text: Got it, I added onions.
user_query: I want to get my shopping list 
response_text: You have two things on that list.
User: Get my shopping list 
Parse: Get_list ( list_label « shopping » list_singular_or_plural « list » )