You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I'm Donald Walker.

ASSISTANT: May I know your name please? Walker, how can I help you today?

USER: I'm a bike racer, please book me a ticket to Las Vegas as I have to attend a bike race competition.

ASSISTANT: Ok. May I know your source and destination codes?

USER: Sure, my source airport code is ORD and my destination airport code is LAS.

ASSISTANT: Ok, could you please share your travelling dates?

USER: I would like to fly here on 10/31 and return on 11/02.

ASSISTANT: Ok, please allow me a moment.

USER: Sure, please carry on.

ASSISTANT: Donald, based on your details there is Spirit airline with flight number 1001 is available having price as 100 and connection as 1.

USER: Fine, please proceed for booking.

ASSISTANT: Ok. Donald, your plane ticket is reserved.

USER: Thank you so much for booking.

ASSISTANT: Thank you for approaching us.