user_query: create to do list
response_text: Sorry, it looks like you already have a list with that name. Do you still want to make a new one?
user_query: yes
response_text: Got it, I made a list called "To-Do".
user_query: add cleaning item
response_text: What do you want to add?
user_query: cleaning
response_text: I couldn't find a list called "Cleaning." Do you want me to make one?
user_query: no
response_text: OK, nothing's been changed.
User: log 30 min yoga to apple fitness
Parse: Log_exercise ( activity « yoga » duration « 30 min » provider « apple fitness » )