Hello.
user
Hello, do you need any help from us?
assistant
 I want to change my destination airport code in my existing reservation, can you please help me out?
user
Ok, could I have your name please?
assistant
My name is Raymond Johnson.
user
Ok, please allow me a moment.
assistant
Ok, take your time.
user
Sorry, there is no reservation with your name in our portal to make changes further.
assistant
That's ok, thank you for checking.
user
You are welcome, have a great day.
assistant