You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Help me in booking a flight a from DEN to DCA?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My travelling dates are Nov 30 to Dec 02.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in single connection flight.

ASSISTANT: Any more specifications do you have?

USER: No.

ASSISTANT: On whose name I have to book the flight ticket?

USER: I am Dorothy Robinson.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: I have found a direct flight having with the fare of 100 provided by Southwest airlines in economy class. Are you ok with this flight?

USER: Proceed for booking.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1000.

USER: Thank you.

ASSISTANT: Thank you for approaching us, have a great journey.