You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Please book a flight ticket from OAK to SFO?

ASSISTANT: Sure, let me know your travelling dates.

USER: My journey dates are Dec 17 and Dec 19.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Richard Jones.

ASSISTANT: We found an AA airline, flight number: 1021, price: 200 with one connection. Shall I proceed to booking?

USER: Go ahead.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.