Hello. My name is Larry Williams.
Hello, how may I aid you today from my end?
Can you help me to cancel the reservation which I had done recently?
Sure, I am here to help you out. Please allow me a moment.
Ok, thank you for the positive response. Take your own time.
Sorry  Larry Williams, there is no active reservation on your name.
Ok, I will check my mails to know more. That is ok, anyways thank you for the information.
Thank you for reaching us.