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. Please let me know your name?
assistant
John Gonzalez here.
user
Let me check details with your recent reservation.
assistant
Ok.
user
Sorry, there is no reservation by your name.
assistant
That's ok, thank you for your help.
user
Thank you.
assistant