You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

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

ASSISTANT: Sure, I will help you. May I know your planned dates please?

USER: My travelling dates are June 13 and June 15.

ASSISTANT: Ok, please specify your name.

USER: My name is Helen Robinson.

ASSISTANT: Ok, help me with your airport codes.

USER: My airport codes are DCA and CLT.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I prefer single connecting flight.

ASSISTANT: Is there any other concerns?

USER: No.

ASSISTANT: We found a connecting flight with a fare of 200 in 1023 United Airlines, shall I proceed?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.