Hi.
Hello. How can I help you?
 I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. can you please help me out with changing of my reservation?
Sure. Please let me know your name?
John Gonzalez here.
Let me check details with your recent reservation.
Ok.
Sorry, there is no reservation by your name.
That's ok, thank you for your help.
Thank you.