Hello, Andrew Nelson here.
Hello Mr. Andrew. How are you doing?
Oh, that is fine. What about you?
I'm doing well. What can I do for you?
Could you please help me out to change my existing reservation?
Yes, I can help you. Please give me a minute and I will get back to you.
OK, sure. Take your own time.
Sorry, there is no existing reservation on your name.
OK, no problem.
Have a good day.