user_query: add roast beef to store list 
response_text: Got it, I added roast beef.
user_query: add roast beef 
response_text: Alright, I added roast beef.
user_query: Display my store list 
response_text: You have two things on that list.
User: Record a 30 minute yoga session to my fitness log
Parse: Log_exercise ( activity « yoga » duration « 30 minute » )