Hello.
Hello. How can I help you?
I want to change my existing reservation. Could you help me with that?
Sure, I am here to help you. May I know your name please?
Thank you. Christopher Wilson here.
Ok, please stand by.
Sure.
Thank you for waiting, sorry we didn't find any reservation on your name.
That's ok, no problem. Thank you.
Thank you for reaching us, have a nice day.