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: Open Texttone and add 555-555-5556, I mean 555-555-5555 to the contact list.
Parse: Add_contact ( phone_number « 555-555-5555 » provider « Texttone » )