Hi.
Hello. How can I help you?
 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 to change your reservation.
Ok.
Ok, please provide me your name.
Margaret Jackson here.
Ok, please allow me a moment.
Ok.
Sorry, no reservation found on your name to change your reservation.
That's ok, thank you for your help.
Welcome, have a nice day.