Hi. Melissa Phillips here.
user
Hello, how may I serve you today?
assistant
 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?
user
Sure, please wait a minute.
assistant
Ok.
user
We have not found any reservation on your given name to change. Thank you for choosing us.
assistant
That's ok, thank you for your help.
user