You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I'm Steven Young.

ASSISTANT: Ok.

USER: I am planning to attend live concert at Las Vegas, can you please help me with booking a flight ticket?

ASSISTANT: Ok, can you please tell me the nearest airport code of Las Vegas and your source code also?

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

ASSISTANT: May I know your travel dates?

USER: Sure, I would like to take off on 04/06 and return back on 04/08.

ASSISTANT: There is a flight available with price 200 and the connection is 1 with spirit airline. Would you like me to proceed with the booking?

USER: Yes, please proceed with the booking.

ASSISTANT: Ok, your ticket has been booked.

USER: I appreciate your help, thank you.

ASSISTANT: Thank you for reaching us.