You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you please help me in booking a flight ticket from LAS to ORD to go for an adventure with my friends?

ASSISTANT: Sure, Can you please share your planned journey dates?

USER: My planned trip dates are Sept 04 and Sept 06.

ASSISTANT: Ok, let me know about your stopover for your journey.

USER: Yes, I need a stopover in between my journey.

ASSISTANT: Do you prefer a normal class or economy class?

USER: I prefer business class for my journey.

ASSISTANT: Is there any other requirements that you are looking for?

USER: No, I don't have any other.

ASSISTANT: May I know your name for documentation purpose?

USER: I am Donna Collins.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We regret to inform you that, there were no flights are available in business class.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching our service.