user_query: actually remove phones from the list
response_text: Which item?
user_query: phones, repair, electrician, plumber
response_text: Sure, I added phones, repair, electrician, plumber.
user_query: To Do list
response_text: What do you want to add?
user_query: Add four items to the list I created this afternoon.
response_text: OK. Which list do you want to add to?
User: Add a new number for Lee's home, I mean mobile.
Parse: Add_contact ( contact « Lee » label « mobile » )