Hi.
Hello, how may I oblige 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 can change your reservation right now. Before that I need to know your good name please?
Melissa Miller here.
Please wait a minute.
Ok.
Sorry to say that, there is no active reservation found on your name.
That's ok, thank you for your help.
Thank you for choosing us.