You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Hill.

ASSISTANT: How can I help you at this moment?

USER: Could you please book a flight ticket with business class?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: Sure, my departure is on March 17 and arrival is on March 19.

ASSISTANT: May I know your airport code names for further process?

USER: My airport codes are SEA and MCO.

ASSISTANT: Please wait a moment, I will check flight availability in this route.

USER: Sure.

ASSISTANT: Sorry no flights are available in this route as per your requested dates.

USER: No problem, thank you for the information.

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