You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to spend my holidays at New York, please help me in booking a ticket from DEN to JFK.

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My planned trip dates are on Dec 17 and Dec 19.

ASSISTANT: Do you have any other specifications?

USER: I prefer an economy class.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: Give me a moment.

USER: Sure, take your time.

ASSISTANT: I have found an economy class ticket with 1 connecting flight.

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.