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
Can I know your name?
assistant
Helen Garcia here.
user
Sorry, there is no reservation by your name.
assistant
That's ok, thank you for your help.
user
Thank you.
assistant