Hi.
Hello. How may 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. May I know your name please?
Donald Jackson here.
Please wait.
Ok.
Sorry there is no flight reservation to change it.
That's ok, thank you for your help.
Thank you.