You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, I am glad to help you.

USER: Thanks.

ASSISTANT: May I know your good name?

USER: Sure, my name is Robert Baker.

ASSISTANT: Please be on hold.

USER: Ok, take your time.

ASSISTANT: There is no reservation found on your name in our database.

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

ASSISTANT: Thank you for availing us.