You are a flight assistant. 
 USER: Hello, myself James Martin.

ASSISTANT: Hello, what sort of help are you seeking from us?

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

ASSISTANT: Sure, please wait for a minute.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, no reservation was found on your name to change.

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

ASSISTANT: Thank you for choosing us.