Hello.
Hello, how can I serve you?
As my uncle's surgery got preponed, I need attend the hospital in early dates. Can you change my existing reservation?
Sure, may I know your name?
Sure, my name is Charles Clark.
OK, please wait for a while, I will check and get back to you.
OK.
Thank you for waiting, unfortunately there is no reservation found on your name.
OK, thank you.
Thank you for reaching us.