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, I will help you with that. May I know your name for further process?
assistant
Charles Baker here.
user
Ok, please hold on a moment.
assistant
Ok.
user
There is no previous reservation available under your name.
assistant
That's ok, thank you for your help.
user
Thank you for reaching us.
assistant