Hi.
user
Hello, how may I aid 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 here to help you. May I know your name?
assistant
Ronald Smith here.
user
Please give me a moment to check your ticket status.
assistant
Ok.
user
Sorry Ronald Smith, no reservation is available by your name.
assistant
That's ok, thank you for your help.
user
Thank you for choosing us.
assistant