Hi.
user
Hello, how can I aid you?
assistant
Could you please cancel my recent reservation due to cancel of my trip?
user
Sure, I am here to help you. May I know your name to check with existing reservation?
assistant
I am Carol Green.
user
 I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.
assistant
No problem, thank you for the information.
user
Thank you for choosing us.
assistant