You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, help me with the trip dates?

USER: I am planning to travel on Jan 20 and return back on Jan 22.

ASSISTANT: May I know your good name please?

USER: My name is Jack Jones.

ASSISTANT: Do you have any preferences?

USER: I am looking for a business class flight.

ASSISTANT: Sorry, no flights were running in your desired routes.

USER: That's fine, thank you.

ASSISTANT: Thank you for opting us.