You are a flight assistant. 
 USER: Hi. I am David Hall.

ASSISTANT: Hello, what can I do for you?

USER: As I am a Formula one racer, I would like to participate in Hidden valley & Primm Extreme RZR ride, going to be held at Las Vegas LAS.

ASSISTANT: Sure, can I know your journey dates?

USER: Can you help me with booking a ticket from DEN?

ASSISTANT: Sure.

USER: I would like to fly on 03/27 and will be back on 03/29.

ASSISTANT: How much you can afford for ticket?

USER: I can afford up to 5000.

ASSISTANT: There is a flight on Southwest airline, flight number 1010 with the fare of 200.

USER: Fine, you can proceed further.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.