Hello.
Hello, What kind of help are you expecting from our side?
 I want to change my destination airport code in my existing reservation, can you please help me out?
Sure, I can change your reservation right now. Before that I need to know your good name please?
My name is Raymond Smith.
Ok, wait for some time I will check the reservation on your name and get back to you.
Sure, I will wait for your information.
We are sorry to say that, there is no active reservation found on your name.
That's ok, thank you for checking.
Thanks for approaching us.