user_query: Add hanger, lock and basket to my grocery list.
response_text: OK, I added hanger, lock and basket.
user_query: Delete lock and basket from the list.
response_text: I couldn't find those two things.
user_query: Delete lock and basket from my grocery list.
response_text: I couldn't find those two things on your list called "Grocery."
user_query: delete hanger from my Grocery list.
response_text: I couldn't find hanger on your list called "Grocery."
user_query: Add a hanger, lock and basket to my grocery list.
response_text: Got it. Hanger, lock and basket on your list called "Grocery". Anything else?
User: Show me the amount owed for December I mean January.
Parse: Get_bill ( billing_date_span « January » )