Hello.
user
Hello.
assistant
I am Joseph Lee.
user
How may I aid 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, I will help you with that.
assistant
Thank you.
user
Please be on hold.
assistant
Sure.
user
We regret to tell you that, there is no reservation found on your name in our records.
assistant
It's ok, thank you for your help.
user