You are a flight assistant. 
 USER: Hello, myself Rebecca Carter.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, give me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no active reservation found under your name.

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

ASSISTANT: Thank you for opting us.