You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service that you are looking from our agency?

USER: Myself Lisa Moore from New York.

ASSISTANT: Welcome to flight booking agency Lisa Moore.

USER: I would like to visit Denver Art Museum with my friends, could you please find the availability of flights from New York?

ASSISTANT: Sure, I am gleeful to help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Which airport do you prefer in New York? As it has number of airports.

USER: I prefer LGA as my source airport code.

ASSISTANT: When would you like to departure on?

USER: I would like to plan my journey on Sept 01.

ASSISTANT: Is there any return trip that you are planning?

USER: Yes, I need to return on Sept 03.

ASSISTANT: Do you prefer either connecting flight or direct flight?

USER: I prefer a connecting flight for this trip.

ASSISTANT: Would you like to travel in a business class or in an economy class?

USER: I want to travel in an economy class, which is comfortable to me.

ASSISTANT: At what time would you like to departure and return?

USER: I would like to return in the evening time.

ASSISTANT: Please wait a moment to check the flights on your route and I will revert back with a best flight to your journey.

USER: Sure, take your time.

ASSISTANT: I regret to say Lisa Moore, there are no flights available for your journey with your requested preferences.

USER: Ok, no problem. I will choose another means of transport to reach my destination. Thank you for your information.

ASSISTANT: Thank you for utilizing our services, have a great day.