Hello, I am Brian Johnson.
Hello, How can I help you now?
Due to an emergency meeting at office, I want to cancel my reservation. Can you help me with that?
 Sure, give me just a minute while I figure this out for you.
OK.
Thanks for your time. We found a reservation on the name of Brian Johnson. Shall I proceed for the cancellation?
Ok, Please cancel my ticket.
Your reservation has been cancelled.
Thanks for your excellent service to the customer.
Thanks for choosing us regarding your cancellation process.