You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me with booking a flight ticket from LAX to JFK?

ASSISTANT: Sure, can I know your good name please?

USER: I am Michael Thompson here.

ASSISTANT:  When you are willing to travel?

USER: My travelling dates are from Dec 14-16.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I would be comfortable with single stop over.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I prefer business class and my depart has to be in evening.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.