You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Can you please aid me to find a flight in the route LGA to JFK?

ASSISTANT: Sure, please share me your trip dates.

USER: Thank you. I would like to start my journey on May 16 and return back on May 18.

ASSISTANT: May I know your class preferences?

USER: Yes, I prefer to travel in a business class.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer to travel in a direct flight.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: My name is Ronald Lopez.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Oh! I will choose some other source to travel. Anyways thank you for finding the flight.

ASSISTANT: Thank you for availing us.

USER: Most welcome.