You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Gary Parker.

ASSISTANT: How can I do for you?

USER: I am planning to attend convocation meeting at Chicago, can you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your airport codes please?

USER: My source airport code is LAS and the destination airport code is ORD.

ASSISTANT: On which date your planning to travel?

USER: Sure, I would like to take off on 10/20 and return back from Chicago on 10/22.

ASSISTANT: Just a moment please, I will get back you with flight information.

USER: Ok, but please make sure that the price limit does not exceed 500.

ASSISTANT: There is a flight with single connection, can I proceed for booking in 1005 flight?

USER: Yes, please proceed with the booking.

ASSISTANT: Your booking is confirmed in Frontier airlines, it costs you 200 only.

USER: I appreciate your help, thank you.

ASSISTANT: Have a great day and happy journey.