You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What help is required from my end?

USER: I want to travel in this weekend on 09/21 and enjoy for two days in Las Angeles and return on 09/23, so can you help me for searching flights on these dates?

ASSISTANT: Could you please provide the take off and landing airport codes?

USER: My take off flight airport code is LAS and landing airport code is LAX.

ASSISTANT: May I know your name please for proceeding further?

USER: I am Joshua Perez.

ASSISTANT: Perez, Spirit airline is providing a service in your route with price 100. Can I book it?

USER: Yes, I am ok with that flight, proceed to booking.

ASSISTANT: Your ticket has been booked with flight number 1011.

USER: Thank you for booking my flight ticket in Spirit airline.

ASSISTANT: Thank you for approaching us, hope you reach us again.