You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket from OAK to DCA. Could you help me in booking? My travelling dates are from Feb 27 - 29.

ASSISTANT: Can I know your name?

USER: Mark Baker.

ASSISTANT: Is there any connection preference? Do you have any other specifications?

USER: I prefer for connecting flight. No.

ASSISTANT: There is a connecting flight with the fare 100 in 1012, shall I proceed with the booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked .

USER: Thank you.

ASSISTANT: Thank you for choosing us.