user_query: Add Blade to the list.
response_text: Alright. Which list do you want to add to?
user_query: Music
response_text: OK. Which list do you want to add to?
user_query: Music
response_text: OK. Which list do you want to add to?
user_query: Music list
response_text: What do you want to add?
user_query: Blade
response_text: OK, I added Blade.
User: Begin the fit fitbit workout.
Parse: Start_exercise ( provider « fitbit » )