You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to travel from DCA to AUS. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: I want to fly in the flight on June 17 and June 19.

ASSISTANT: Do you have any connection limit preference?

USER: I am looking for a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: Paul Scott.

ASSISTANT: Sorry, there is no flight available for the mentioned dates.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.