user_query: Tomorrow morning
response_text: OK, I'll remind you on Wednesday at 8:00 AM.
user_query: Make a hair appointment
response_text: OK, Make a hair appointment. When do you want to be reminded?
user_query: Create reminder, please
response_text: What's the reminder?
User: Make a contact for 555-5555
Parse: Add_contact ( phone_number « 555-5555 » )