user_query: Oh yeah, his name is Mason
response_text: Sorry, I'm not finding a match in your contacts. Tell me just the first name ? or feel free to use the screen.
user_query: Mr. Scott. I forgot his first nams. 
response_text: There's no phone number listed for that contact.
user_query: Can you call that guy Scott, please?
response_text: Sorry, who do you wanna call?
User: Start, no, resume karate.
Parse: Resume_exercise ( activity « karate » )