You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I want to book a ticket from JFK to LGA. Could you book a ticket?

ASSISTANT: Sure, could I have your journey dates, please?

USER: Departure is by June, 6 and return date is June, 8.

ASSISTANT: Please let me know your connection limit?

USER: I would prefer direct flight.

ASSISTANT: Are there any more specifications?

USER: I prefer business class.

ASSISTANT: May I know your good name to proceed further?

USER: My name is Justin Wright.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Thank you.

ASSISTANT: Thank you for choosing us.