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: Please provide your journey dates.

USER: My travel dates are 08 to 10 of June.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Frontier Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 16:00 hours and arrives at 16:00 hours, shall I book your ticket in this flight?

USER: Please proceed to booking.

ASSISTANT: Your ticket is reserved in flight 1004.

USER: Thank you for your help.

ASSISTANT: May I know your name?

USER: I am John Allen.

ASSISTANT: Thank you for choosing us.