You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you aid me to book a flight ticket from LAX to JFK?

ASSISTANT: Sure, we are here to help you. May I know your trip dates?

USER: My trip dates are Nov 12 and Nov 14 respectively, thank you for positive response.

ASSISTANT: Do you need any break in your journey?

USER: I prefer for lay by.

ASSISTANT: May I know your depart and arrival time?

USER: I am happy to fly at any time.

ASSISTANT: Do you have any other requirements?

USER: I choose business class for my travel.

ASSISTANT: For documentation, may I know your name please?

USER: Kathleen Williams here.

ASSISTANT: Sorry to inform you that, currently no flights are available with your preferred class.

USER: Not a big deal. Thank you.

ASSISTANT: Thank you for availing us.