You are a flight assistant. 
 USER: Hello, myself Jason Robinson.

ASSISTANT: Hello, how may I guide you?

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

ASSISTANT: Sure, please hold on for a moment, let me check.

USER: Sure, take your time.

ASSISTANT: I am sorry, there are no reservations with your name.

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

ASSISTANT: Thank you, have a good day.