You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: 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 airport codes?

USER: My airport codes are LAS and EWR.

ASSISTANT: Can you please share your planned trip dates?

USER: My travelling dates are Oct 31 and Nov 02.

ASSISTANT: Do you have any connection limit?

USER: I need single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to departure and return on afternoon. I want to travel in business class.

ASSISTANT: May I know your good name?

USER: My name is Eric Martinez.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.