You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to book a ticket from JFK to DEN. Could you book a ticket?

ASSISTANT: May I know your trip dates?

USER: Depart is by Dec, 10 and return date is Dec, 12.

ASSISTANT: Do you have any connecting flight preferences?

USER: I would prefer connecting flight.

ASSISTANT: May I know your name please?

USER: I am Jennifer Scott.

ASSISTANT: No flights found as per your preferences at the moment.

USER: Thanks.

ASSISTANT: Thank you for choosing us.