My name is Mark and I want a ride from 'University' to 'Hospital'.
I found a Uber ride for you from 'University' to 'Hospital' for 39 credits
that could pick you up in 15 minutes. Should I book that for you?
yes
Ride booked.
great
Is there anything else that I can do for you?
I changed my mind and don't need a ride anymore.
Okay. Good bye!