You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jonathan Carter.

ASSISTANT: How may I assist you?

USER: Can you please help me in booking my flight ticket from OAK to DFW?

ASSISTANT: Sure, I will help you. Could you please share your planned travel dates?

USER: My travelling dates are 10/25 and 10/27.

ASSISTANT: Please hold on a moment.

USER: Ok, sure.

ASSISTANT: Jonathan, I found a flight for you in Spirit airlines with fare 200. Can I book your ticket?

USER: Ok, please proceed with booking.

ASSISTANT: Ok, your booking is confirmed with flight number 1004.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us, have a great day.