Hello.
Hello, how may I help you?
I need to change my existing reservation.Can you help me in changing reservation?
Sure, I am here to help you. To change an existing reservation, I need to know your name?
Dorothy Johnson is my name.
OK, please wait for a moment.
OK.
Thanks for waiting. Sorry there are no reservation found on your name.
OK, thanks.
Thank you, have a nice day.