Hi.
Hello, how may I render 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?
I am Helen Roberts.
Ok, please wait for a minute.
Ok.
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
That's ok, thank you.
Thank you for choosing us.