You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning. How may I guide you?

USER: I am Deborah Lee, can you make my reservation from SFO to ATL?

ASSISTANT: Sure, can I know your preferable dates?

USER: My trip dates are from 05/16 to 05/18.

ASSISTANT: Please hold on for a moment, let me check.

USER: Ok.

ASSISTANT: I am sorry to inform you that there are no flights available. Thank you, have a good day.

USER: Thank you.