You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I would like to book a flight ticket from AUS to DCA  to meet my sister.

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Sure, my travelling dates are Feb 14 and Feb 16.

ASSISTANT: Do you have any connection limit preference?

USER: I want to travel in a direct flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: I am Stephen Wilson.

ASSISTANT: Stephen Wilson, there is no direct flight service available on this route on your provided dates.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for contacting us.