user_query: buy me food
response_text: I got: Buy me food.. Ready to send it?
user_query: mom
response_text: Alright, what's the message?
user_query: john
response_text: Sorry,, who do you wanna message?
user_query: message someone
response_text: Who do you wanna message?
User: Hey fitbit. start my exercise
Parse: Start_exercise ( provider « fitbit » )