Hi.
user
Hello, how may 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, I am happy to help you. Can you please let me know your good name?
assistant
Daniel Taylor here.
user
Sorry, we did not find any active reservation on your name our records.
assistant
That's ok, thank you for your help.
user
Thank you for availing us.
assistant