Hi.
user
Hello. How can I help 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 will help you to change your reservation.
assistant
Ok.
user
Ok, please provide me your name.
assistant
Margaret Jackson here.
user
Ok, please allow me a moment.
assistant
Ok.
user
Sorry, no reservation found on your name to change your reservation.
assistant
That's ok, thank you for your help.
user
Welcome, have a nice day.
assistant