You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, we are here to help you. May I know your travel dates?

USER: My travelling dates are June 29 and July 01.

ASSISTANT: Do you need any way station in your journey?

USER: I prefer single connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: No, I don't have any other preferences.

ASSISTANT: Where you need to catch the flight and land?

USER: My airport codes are MSP and DCA.

ASSISTANT: May I know your name please?

USER: Laura Evans.

ASSISTANT: There is a connecting flight with fare of 200 and 1009 flight number. Shall I proceed?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Your seat has been reserved with United Airlines in economy class.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.