Hi.
Hello.
 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 in changing my reservation?
Sure, may I know your name to check for the previous reservation?
Sure, myself Patrick White.
Please allow me a moment.
Sure.
There is no reservation found under your name in our data base.
It's ok, thank you.
Thank you for contacting us.