Hi.
user
Hello, how can I help you?
assistant
I want to cancel my recent reservation owing to an emergency.
user
 Sure, I am here to help you. May I know your name to check with existing reservation?
assistant
Thomas Walker.
user
 I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.
assistant
Thank you.
user
Thank you for choosing us.
assistant