Hi.
Hello, how can I help 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, may I know your good name?
William Phillips here.
Please wait for a moment.
Ok.
Sorry to say that, no reservation was found with your good name.
That's ok, thank you for your help.
Thank you for reaching us.