You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Could you please book a flight ticket from IAD to DCA?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

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

ASSISTANT: Do you need any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Cynthia Thompson.

ASSISTANT: Frontier Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 4:00 hours and arrives at 8:00 hours, shall I book your ticket in this flight?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket is reserved in flight 1004.

USER: Thank you.

ASSISTANT: Thank you for opting us.