user_query: Erase my list.
response_text: You have eleven lists. Which one do you want to delete?
user_query: Home Depot list
response_text: You have eleven lists. Which one do you want to delete?
user_query: Create a movie list: movie1, movie2, movie3
response_text: OK, I made a list called "Movie1, Movie2, Movie3".
User: Begin pilates.
Parse: Start_exercise ( activity « pilates » )