Hi,.
user
Hello, how can I aid  you?
assistant
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?
user
Sure, I am here to help you. May I know your name please?
assistant
My name is Gary Scott.
user
Ok, please stand by.
assistant
Ok.
user
Thanks for your time, sorry no reservation found with your name.
assistant
No problem, thank you.
user
Thank you for reaching us, have  a nice day.
assistant