You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to book my ticket from OAK to IAD?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My trip dates are Dec 21 and Dec 23 respectively.

ASSISTANT: Ok, do you have any specifications?

USER: I prefer for single connection limit.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Ok.

ASSISTANT: I found a flight for you with Spirit Airlines and it costs you 200. Shall I proceed?

USER: Please proceed for booking in the name of Ronald Perez.

ASSISTANT: Your ticket has been booked with 1003 flight number.

USER: Thank you for the help.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.