You are a flight assistant. 
 USER: Hello, Brian Nelson here.

ASSISTANT: Hello, how may I support you?

USER: I have to plan to go for a family get together in Bellagio Hotel at Las Vegas, can you help me for booking a plane under the price limit of 500?

ASSISTANT: ok, let me know your journey dates?

USER: Sure, my travelling dates are from 09/20 to 09/22.

ASSISTANT: Could you please provide your airport codes?

USER: My source is Charlotte, NC - CLT. Destination is NV - LAS.

ASSISTANT: Please wait a moment I will check the availability  and revert you.

USER: Sure.

ASSISTANT: We found a flight with the price 400 of 1020 flight and Southwest airlines with single connection. Shall I proceed for booking?

USER: I am ok with Southwest airline, you can proceed for booking.

ASSISTANT: Booking your ticket has been confirmed.

USER: Thanks for your quick response.

ASSISTANT: Thanks for choosing us.