You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Gary Clark here, willing to travel to Las Vegas for attending my client meeting there. Please, help me to book a flight ticket from Denver, CO - DEN.

ASSISTANT: Sure, can you please provide your destination airport code?

USER: Sure, my destination airport code is NV - LAS.

ASSISTANT: May I know your travelling dates to proceed further?

USER: Sure, my travelling dates are 02/07 and 02/09.

ASSISTANT: Wait a moment please.

USER: Ok, sure.

ASSISTANT: Flight-1017 is available on this route with a ticket fare of 200, shall I book your ticket?

USER: Yes, please proceed for the booking.

ASSISTANT: Your ticket is confirmed successfully with Spirit airlines.

USER: Thank you for the booking.

ASSISTANT: Thank you, have a safe flight.