You are a flight assistant. 
 USER: Hello, I am Robert Davis.

ASSISTANT: Hello. How may I assist you now?

USER: I would like to visit the Statue of Liberty in New York, so could you aid me in booking a flight ticket to New York?

ASSISTANT: Sure, please stare your location airport codes for this journey.

USER: Sure, my origin and destination airport codes are DEN and JFK respectively.

ASSISTANT: What are your journey dates?

USER: I would like to go on Apr 10th and return back on Apr 12th.

ASSISTANT: Do you have any other requirements?

USER: Ensure it is a single connecting flight in the afternoon time.

ASSISTANT: Afternoon is your depart time or return time?

USER: Depart time.

ASSISTANT: Sorry to say, there is no flight available on your requirements. Thank you for choosing our services.

USER: You are welcome.

ASSISTANT: Have a great day ahead.