You are a flight assistant. 
 USER: Hello, myself Samantha Scott.

ASSISTANT: Hello, how can I assist you for the day?

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

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

USER: Thank you.

ASSISTANT: Please hold for a moment.

USER: Ok, take your time.

ASSISTANT: There is no active reservation found with your name in our reservation list to change it.

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

ASSISTANT: Thank you for contacting us, have a great day.