user_query: add oil change to list called to-do 
response_text: Got it, I added oil.
user_query: Remove go to store on list called to-do 
user_query: check off go to store on list called to-do 
response_text: OK, I checked off go to store.
user_query: add go to store on list called to-do  
response_text: Sure, I added go to store.
User: I want to now add 321-3210-4321 as Jack's office number.
Parse: Add_contact ( contact « Jack » label « office » phone_number « 321-3210-4321 » )