You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: Can you help me in booking a flight ticket from JFK to DEN?

ASSISTANT: Sure, we are mirthful to help you. When are you planning to go and return back from your journey?

USER: I will start on July, 20 and return back on July, 22.

ASSISTANT: Do you need any layover in between journey?

USER: No, I would prefer direct flight.

ASSISTANT: May I know your good name please?

USER: Melissa Brown here.

ASSISTANT: Is there any another specifications on your trip, so that I can arrange like that only.

USER: No, thank you for asking.

ASSISTANT: Give me a minute, I will check and let you know the flight availability.

USER: Sure.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for approaching us, wish you a great day.