You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My travelling dates are May 27 and May 29.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My airport codes are DFW and LGA.

ASSISTANT: Do you prefer a direct or connecting flight?

USER: Connecting flight.

ASSISTANT: Do you have any other requirements to be met?

USER: No, I don't have any other preferences.

ASSISTANT: Can I have your name please?

USER: My name is Dorothy Campbell.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for visiting us.