You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Robinson.

ASSISTANT: How may I assist you now?

USER: Can you please help me in booking my flight ticket from BOS to MCO?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates will be Nov 26th to Nov 28th.

ASSISTANT: Do you have any class preference?

USER: I am ok, with any class.

ASSISTANT: Is there any particular timings in your departure and arrival timings?

USER: My return time should be in the afternoon.

ASSISTANT: Any connection limit do you have?

USER: I need a connecting flight.

ASSISTANT: Please be on hold to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no flights available for your journey with your requested preferences.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us, have a great day.