Hi.
Hello. How may I assist 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 am here to help you with your concern. May I know your name please to check the status of your reservation?
Janet Turner here.
Please wait for a minute.
Ok.
Janet Turner, no reservation has been found on your name in our records.
That's ok, thank you for your help.
Thank you for choosing us.