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, I will help you with that. May I know your name for further process?
Charles Baker here.
Ok, please hold on a moment.
Ok.
There is no previous reservation available under your name.
That's ok, thank you for your help.
Thank you for reaching us.