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. Can you please share me your name to check your previous reservation.
assistant
Frank Edwards here.
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