You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: Can you aid me to book a ticket from DCA to AUS?

ASSISTANT: May I know your planned travel dates?

USER: My trip dates are Feb 7 and Feb 9 respectively.

ASSISTANT: Do you prefer any class?

USER: No class preferences for me.

ASSISTANT: Any connection limit do you prefer?

USER: Make sure that I need a single connecting flight.

ASSISTANT: Any airlines do you want?

USER: Please provide the well known airlines.

ASSISTANT: May I know your name?

USER: Jerry King here.

ASSISTANT: Any other specifications do you need?

USER: Please make sure that my return journey should be in the evening.

ASSISTANT: Sorry, according to your specifications we have not found any flight.

USER: No issue,thank you.

ASSISTANT: Thanks for reaching us.