Hello.
Hello,. How  can I amend you today>?
Due to heavy rain, I want to cancel my reservation. Can you help me?
Sure, we are here to aid. Let me know your name to check with the reservation.
Sarah Smith here.
Give a minute, I will check the previous list and let you know the details of it.
Ok.
Thanks for you time, there is no reservation found on your name for cancellation.
No problem, Thanks for the information.
Thank you for reaching us.