You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid 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 aid you with that. Can you please mention your preferable travel dates?

USER: My travelling dates are Apr 17 and Apr 19.

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

USER: My airport codes are DTW and IAD.

ASSISTANT: May I know your name for further process?

USER: My name is Stephanie Turner.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I prefer single connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: Delta airline 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 1027.

USER: Thanks for helping me.

ASSISTANT: You are welcome Stephanie Turner.