Hello. I am Sharon Brown.
Hello. How may I assist you?
I want to change my reservation as my get together program got postponed. Can you help me?
Ok, please wait for a while.
Sure.
Ok, thank you for waiting. I am very sorry to say, I did not find any active reservation on your name to change your details.
That's Ok, thanks for your response.
Ok, thank you for reaching us, we hope we will give you  a better service for next time.