Hi.
user
Hello. How can I  help you?
assistant
Myself Dorothy Campbell. Due to some conference meeting, I am going to cancel my reservation. Can you please help me in cancelling the reservation?
user
Just a moment please.
assistant
Sure, I will wait for your response.
user
I am sorry no reservation found on your name.
assistant
Not a big problem, anyhow thank you very much for your service.
user
Thank you for choosing us.
assistant