You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: Can you please book the ticket from OAK to AUS? As I'm planning to visit Austin.

ASSISTANT: Sure, please share your trip dates?

USER: Sure, I would like to depart on 15th Dec and I want to return back by 17th Dec.

ASSISTANT: Please share your connection limit.

USER: I prefer single connected flight.

ASSISTANT: Please share your specifications.

USER: I don't have any other specifications.

ASSISTANT: Can I know your good name?

USER: My name is Robert Brown.

ASSISTANT: Thank you for your details, we found a connecting flight 1007 in class economy which is in Spirit airline. Shall I proceed?

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

ASSISTANT: Your ticket has been confirmed.

USER: Thank you so much for your help.

ASSISTANT: Thank you.