You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Anthony White. I would like to book a flight ticket from NC - CLT to IL - ORD, so please help me in booking a flight ticket.

ASSISTANT: Sure, we are here to help you. Please, share your depart date.

USER: I would like to fly on 12/05 and return on 12/07.

ASSISTANT: Kindly, mention your fare limit.

USER: I can afford up to 5000.

ASSISTANT: Would you prefer either business class or economy class?

USER: I would like to prefer business class.

ASSISTANT: Please, share your connection limit.

USER: Yes I need a halt in between my journey.

ASSISTANT: Thank you for sharing your journey details. Please, hold on.

USER: Sure.

ASSISTANT: Thank you for your valuable time. We are sorry to inform you that, no flight tickets are available in business class.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us, have a great day.