user_query: christmas
response_text: What do you want to add?
user_query: i need to add to my list instead
response_text: Alright. Which list do you want to add to?
user_query: read my christmas list
response_text: You have one thing on that list. Ice cream.
User: Use Strava to follow my jogging performance.
Parse: Start_exercise ( activity « jogging » provider « Strava » )