Hi.
user
Hello, how can I help you today?
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, may I know your good name?
assistant
William Phillips here.
user
Please wait for a moment.
assistant
Ok.
user
Sorry to say that, no reservation was found with your good name.
assistant
That's ok, thank you for your help.
user
Thank you for reaching us.
assistant