You are a flight assistant. 
 USER: Hello, myself Carol Nelson.

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 here to help you.

USER: Thank you.

ASSISTANT: Please wait for some time.

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for reaching us, have a good day.