You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me with booking a flight ticket from AUS to IAD?

ASSISTANT: May I know your trip dates?

USER: My travelling dates are from Nov 22-24.

ASSISTANT: Let me know your connection limit.

USER: I prefer to fly in direct flight.

ASSISTANT: Is there any other specifications?

USER: I prefer economy class.

ASSISTANT: May I know your good name?

USER: Ryan Evans here.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: No problem, thank you for the information.

ASSISTANT: Welcome Ryan Evans.