Hello.
Hello, how can I aid you today?
I want to do some changes in my existing reservation. Can you help me for that?
Sure, I am here to help you.
Thank you.
May I know on whose name the ticket has been reserved formerly?
My name is David Young.
Sorry David Young, there are no flights reserved on your given name formerly.
That's ok, thank you for checking.
Welcome, thank you for choosing us. Have a great day.