You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: I want to meet my parents in New York. Can you help me in booking flight ticket from DEN to JFK?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates are Sept 24 to Sept 26.

ASSISTANT: May I know your name please?

USER: Myself Brandon King.

ASSISTANT: Any connection limit do you have?

USER: I need a direct flight.

ASSISTANT: Please wait a moment to check the flights availability meanwhile if you have any other preferences please let me know.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no flights available for your journey with your requested preferences.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.