You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Collins.

ASSISTANT:  how can I aid you?

USER: I need to book a flight ticket from JFK to DEN, Can you please help me for booking?

ASSISTANT: Ok, may I know your travel dates?

USER: I would like to travel on 12/31 to return on 01/02.

ASSISTANT:  Do you have any preferences?

USER: I need a connecting flight with fare of 1000.

ASSISTANT: We found a connecting flight Spirit with flight number 1003 and fare is 200. Shall I proceed?

USER: Ok, proceed for booking.

ASSISTANT:  Your booking is confirmed.

USER: Thanks for your information.

ASSISTANT: Thank you for opting us.