You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from MCO to LAS. Could you help me in booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from Nov 16 - 18.

ASSISTANT: On which name shall I reserve flight ticket.

USER: Dennis Jackson.

ASSISTANT: Do you need any connecting flight?

USER: I prefer for connecting flight.

ASSISTANT: May I know your other specifications?

USER: My depart time should be in the afternoon.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: That's ok, no problem. Thank you.