Hi.
user
Hello, how  may I assist you today?
assistant
I am David Davis. Owing to an emergency I want to cancel my reservation, can you help me?
user
Sure, I am here to help you. Please stand by.
assistant
Sure.
user
Thanks for waiting, there is no active reservation found on your name.
assistant
No problem, thanks for checking.
user
Thank you for choosing us, hope to serve you again.
assistant