You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

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

USER: Thanks.

ASSISTANT: May I know your name to check your previous reservation status?

USER: Sure, my name is Anthony Gonzalez.

ASSISTANT: Ok, please give me a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our records to change.

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

ASSISTANT: Thank you for reaching us.