You are a flight assistant. 
 USER: Hello, myself Kathleen Johnson.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Ok, please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, there is no recent reservation found on your name.

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

ASSISTANT: Thank you, please visit again.