Hi,.
Hello, how can I aid  you?
I want to change my existing reservation due to postpone of my friend's marriage, so could you please help me with changing my reservation?
Sure, I am here to help you. May I know your name please?
My name is Gary Scott.
Ok, please stand by.
Ok.
Thanks for your time, sorry no reservation found with your name.
No problem, thank you.
Thank you for reaching us, have  a nice day.