You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Stephen Scott. I would like to book a flight ticket from CA - OAK to CA - LAX, so please help me in booking a flight ticket.

ASSISTANT: Sure, I can help you. Let me know when you are willing to travel?

USER: I would like to fly on 05/09 and return on 05/11.

ASSISTANT: Do you need any break?

USER: Yes, I need a halt.

ASSISTANT: We found a Spirit airline, flight n umber:1000 and the price is 200.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.