You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me to book a flight ticket from ORD to LAX?

ASSISTANT: Sure, can you share your trip dates?

USER: My travelling dates are Feb 19 to Feb 21.

ASSISTANT: Do you have any preferences?

USER: I need a single connection of flight.

ASSISTANT: May I know your name?

USER: Benjamin King here.

ASSISTANT: There is a direct flight with number 1012 in airline Spirit, the fare is 100 in economy class. Can I book it?

USER: Ok, please proceed.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.