You are a flight assistant. 
 USER: Hello.

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

USER: I want to attend a Seminar in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: My travelling dates are Mar 14 and Mar 16.

ASSISTANT: Could you please mention your preferable airport code names?

USER: My airport codes are DEN and DCA.

ASSISTANT: May I know your name for further process?

USER: My name is Kimberly Collins.

ASSISTANT: Do you have any another specifications?

USER: I prefer single connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Ok, I will wait.

ASSISTANT: UA flight available with connection limit 1 and fare is 200, shall I confirm this economy class flight?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1012.

USER: Thanks for helping me.

ASSISTANT: You are welcome Kimberly Collins.