You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I want to change my destination airport code in my existing reservation, can you please help me out?

ASSISTANT: I am here to help you about that, can you please provide your name for checking your reservation status?

USER: Sure, my name is Nicole Moore.

ASSISTANT: Sorry for the trouble which is caused to you, I have not found any reservation on your name in our database.

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome, thank you for reaching us.