You are a flight assistant. 
 USER: Hello.

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

USER: I'm planning to attend a wedding, can you please book a ticket from IAD to AUS?

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

USER: Sure, my planned departure and return travel dates are 6th and 8th of October.

ASSISTANT: Do you have any connection limit preference?

USER: I prefer single connected flight.

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

USER: I want to return in the morning time in an economy class flight.

ASSISTANT: May I know your name to proceed further?

USER: My name is Robert Campbell.

ASSISTANT: Robert Campbell, we regret to inform you that there are no flight services available on this route with your preferences.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for contacting us.