You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I need a connecting flight for my journey to Denver city for celebrating a youth festival over there. Can you please help me in booking a flight ticket from New York?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: Thank you for considering my request. My preferable journey dates are Sep 27 and Sep 29.

ASSISTANT: Can you please mention your source and destination airport codes to proceed further?

USER: Sure, my source and destination airport codes are EWR and DEN.

ASSISTANT: May I know your name please?

USER: Sure, my name is Kevin Nelson.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.