You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may i assist you today?

USER: Donna Nelson here. I want to attend a Marriage in New York. Can you please help me for booking the flight ticket?

ASSISTANT:  Sure, I can help you and can you please mention your departure and arrival dates of your journey?

USER: My travelling dates are 06/16 and 06/18.

ASSISTANT: Thank you, can you please provide me the airport codes?

USER: My airport codes are DEN and JFK.

ASSISTANT: Do you want any halt in between your journey?

USER: I would prefer nonstop flight.

ASSISTANT: Sure, is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: My departure time is morning.

ASSISTANT: Sorry, there is no flight found with your requirement.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you, for reaching us.