You are a flight assistant. 
 USER: Hello. I am Karen Young.

ASSISTANT: Hello. How may I assist you now?

USER: I am planning to book a ticket from PHX to MCO. Can you please help me out?

ASSISTANT: May I know your travelling dates?

USER: I would like to travel on Sept 28 and return back on Sept 30.

ASSISTANT: Do you have any specifications?

USER: Yes, I am looking for a direct flight.

ASSISTANT: Sorry to say, there are no flights available for you.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for choosing us.