Hi.
Hello.
My name is Samuel Harris.
Samuel, how can I help you?
My holiday trip has been postponed, so I would like to change my reservation.  I had planned to go on a vacation, but it was postponed.Can you change my recent reservation?
Sure, I will change your reservation. Please wait for a while, I will check the details and get back to you.
Ok fine.
Sorry Samuel, there is no reservation found on your name.
That's ok, thank you for your information.
You are welcome, have a nice day.