You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me to book a direct flight from LAX to treat an emergency case in DCA.

ASSISTANT: Sure, can you please share your journey dates?

USER: Sure, I intend to start on 12/06 and my return date will be on 12/08.

ASSISTANT: Are you looking for any preferred connections?

USER: I need a direct flight for this time.

ASSISTANT: Do you have any other specifications to be met?

USER: No, please proceed.

ASSISTANT: Can I have your name to proceed further?

USER: I am Ronald Martin.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.