You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: Will you please assist me to make a reservation from DEN to MCO?

ASSISTANT: Ok, I am here to help you with that. Can I know your planned trip dates?

USER: My travelling dates are Jan 16 and Jan 18.

ASSISTANT: May I know your name?

USER: My name is Kimberly Wright.

ASSISTANT: Is there any other preference?

USER: I need to travel in business class.

ASSISTANT: We are regret to inform you that, there are no flights available based on your journey dates.

USER: Ok, not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.