You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a flight ticket from DCA to SFO. Could you help me?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are from Nov 20 - 22.

ASSISTANT: Can you please share your name?

USER: David Wilson.

ASSISTANT: Is there any connection preference?

USER: I prefer for connecting flight.

ASSISTANT: Do you have any other specification?

USER: No.

ASSISTANT: Spirit airlines is providing connecting flight for you with the fare of 200 in economy class, shall I proceed with the booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked with the flight-1009.

USER: Thank you.

ASSISTANT: Thank you for choosing us.