You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help that you need from my side?

USER: Jonathan Evans here. I want to attend a Seminar in New York. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your regional airport codes?

USER: My airport codes are LAS and JFK.

ASSISTANT: May I know your desired travel dates?

USER: My travelling dates are 08/02 and 08/04. I want to travel in business class.

ASSISTANT: Is there any time preferences that you need?

USER: I want to departure on evening.

ASSISTANT: Please be on hold for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flight found on your journey dates to book a flight ticket.

USER: Anyway, thanks for the information.

ASSISTANT: You are most welcome and have a nice day.