Hi.
Hello.
Anna Jones here.
How can I aid you at this moment?
 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, I will help you with that. Please wait a moment, I will check your previous reservation status.
Ok.
There is no previous reservation available in your name.
That's ok, thank you for your help.
Thank you for reaching us, have a good day Anna Jones.