You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit Denver to meet my friends.Can you please help me for booking the flight ticket from NV-LAS to CO-DEN?

ASSISTANT: Sure, can I know your travel dates please?

USER: The travelling dates are from 05/16 to 05/18. Make sure that the price should not be more than 200.

ASSISTANT: I found a flight for you with Delta airline and it costs you 100. Shall I proceed?

USER: Yes, proceed.

ASSISTANT: May I know your name please?

USER: Sure, my name is Joseph King.

ASSISTANT: Your ticket has been booked on Joseph King with 1008 flight number.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us. Have a safe flight.