Hi.
user
Hello, how may I serve you at this moment?
assistant
Owing to an emergency I want to cancel my reservation, can you help me?
user
Sure, we are here to  help you. May I know your name please?
assistant
I am Sarah Edwards.
user
Sorry, we could not find any reservation with your name.
assistant
No problem, thanks for checking.
user
Thank you for availing us.
assistant