You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning.

USER: My name is Angela Hall. Good Morning.

ASSISTANT: How may I aid you?

USER: I want to visit Washington DCA on 08/03 to attend my brother's wedding.

ASSISTANT: Can I know your return details?

USER: I would like to return back on 08/05 to CLT.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: I am sorry to inform you that there are no flights available.

USER: That's fine.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your time.