Hello.
user
Hello, what can I do for 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 in changing my reservation?
user
Sure, please forward your name.
assistant
Myself Larry Thomas.
user
Please wait.
assistant
Sure.
user
 Sorry, no reservation found on your given name in our database to change it.
assistant
It's ok, thank you for your help.
user
Thank you for contacting us.
assistant