You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Emily Thompson here, I want to change my destination airport code in my existing reservation. Can you please do it for me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check your previous reservation status.

USER: Ok, I will be on hold for your response.

ASSISTANT: There is no previous reservation available in your name.

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

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