You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you please help me in booking from DCA to LAS?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My travelling dates are from Mar 15 to Mar 17.

ASSISTANT: Do you have any connection limit preference?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: My name is Rebecca Scott.

ASSISTANT: American Airlines is providing direct flight on this route with a ticket fare of 200 and flight departs at 23:00 hours and arrives at 18:00 hours, shall I book your ticket in this flight?

USER: Ok, please book it.

ASSISTANT: Rebecca Scott, your ticket is booked in flight number 1001.

USER: Thank you.

ASSISTANT: You are welcome and have a safe journey.