You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you help me in booking a flight ticket from PHX to MCO?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Thank you. I want to travel on 09/19, and return on 09/21.

ASSISTANT: Ok, do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: May I know your name please?

USER: I am Daniel Anderson.

ASSISTANT: Sorry Daniel Anderson, there are no flights available on your requested dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.