Hello.
Hello. How may I help you now?
 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 am here to help you.
Thank you.
To do modifications, let me know your name please.
Sure, myself Christopher Williams.
Thanks for your name, please wait a while.
Sure.
Thank you for waiting, there is no reservation found on your name.
It's ok, thank you for your time.
Thank you.