Hi.
Hello, how can I aid you today?
 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, we are glad to assist you in that.
Ok.
May I know your name for further proceeding?
Jason Allen here.
I am very sorry to inform you that there is no reservation found under your name in our database.
That's ok, thank you for your help.
Thanks for reaching us.