Hello,.
Hello, how could I oblige you?
 I need to cancel my reservation as I need to stay back in own city due to my house has collapsed by Floods. Can you help me with that?
May I know your name please?
I am Raymond Phillips.
Please wait a moment, let me check your reservation and let you know.
Sure.
Unfortunately there is no reservation found with your given name.
Ok, no issues. Thanks for the information.
Thank you for opting us.