Hi.
Hello, how can I serve you?
Due to the sudden illness of my mother, I just want to cancel my reservation. Can you help me with that?
Sure, may I know your good name?
Sure, I had a reservation with name  Gary Lewis.
Ok, please wait for a while.
Sure.
Thanks for waiting, no reservation was found with your name.
Ok, no worries at all.
Thanks for reaching us.