You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to meet my friend on his birthday, can you please help me to book the flight ticket from CLT to LAX?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, I want to depart on 05/13 and return on 05/15.

ASSISTANT: There is a direct flight with number 1003, the fare is 100 in airline Spirit. Can I book it?

USER: That's fine for me, you can book the ticket.

ASSISTANT: On your request, the ticket is confirmed. May I know your name?

USER: My name is Joseph Young.

ASSISTANT: Thank you for booking.

USER: You are welcome.