You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Brian Martin, can you please help me in modification of my reservation as I have done with wrong destination code?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry Brian Martin, there is no reservation on your name in our database.

USER: Not an issue, anyways thank you for the information.