user_query: begin a vacation packing list
response_text: OK, I made a list called "Vacation Packing".
user_query: add shoes 
response_text: Sure. Shoes on your list called "Vacation Packing". Anything else?
User: log 30 min weight training to apple fitness
Parse: Log_exercise ( activity « weight training » duration « 30 min » provider « apple fitness » )