You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to meet my son on his birthday, can you please help me to book the flight ticket from PHL to IAD?

ASSISTANT: Sure, may I know your journey dates please?

USER: I will depart on 09/12 and return on 09/14.

ASSISTANT: May I know your name please?

USER: My name is Helen Evans.

ASSISTANT: I found a flight in Spirit airlines with price 100. Shall I book the ticket?

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

ASSISTANT: Your ticket is confirmed and the flight number is 1015.

USER: Thank you very much.

ASSISTANT: Thank you for choosing us.