You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, can you please let me know your trip dates?

USER: My travelling dates are Feb 19 and Feb 21.

ASSISTANT: May I know your airport codes?

USER: My airport codes are LAS and DCA.

ASSISTANT: Do you have any connection limit preference?

USER: I prefer single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Could you help me with your name please?

USER: Nancy Anderson.

ASSISTANT: American Airlines is providing a connecting flight with 1014 flight number and airfare is 100. Shall I proceed?

USER: Please proceed for booking the flight ticket.

ASSISTANT: For a economy class your ticket is booked.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.