Hi.
Hello, how can I be at your service?
 I have to cancel my flight ticket that I unable to travel to meet my sister that she came to meet me, can you help me in that one?
Sure, please share your name to check current reservation.
Sure, my name is George Gonzalez.
We have found reservation on your name, shall I cancel it?
Ok, please cancel it.
Your reservation is cancelled.
Anyways, thank you for your service.
Thank you for reaching us.