Hi.
user
Hello, how can I aid you?
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, I am here to help you. May I know your name?
assistant
Jason Wilson here.
user
 I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
That's ok, thank you for your help.
user
Thank you for choosing us.
assistant