You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to book a flight ticket from DCA to LAS.

ASSISTANT: Can I have your trip dates?

USER: My trip dates are Sept, 19 and Sept, 21.

ASSISTANT: Do you need any connection limit? Is there any other specifications?

USER: I would prefer single connection. No, thank you.

ASSISTANT: May I know your name?

USER: Steven Scott.

ASSISTANT: Frontier Airlines is providing direct flight on this route with a ticket fare of 200 and flight departs at 5:00 hours and arrives at 15:00 hours, shall I book your ticket in this flight?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed in flight 1013.

USER: Thank you.

ASSISTANT: Thank you for choosing us.