You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book a flight from CLT to MCO?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: I want to depart on Dec 11 and need to return on Dec 13.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with single connection.

ASSISTANT: Are there any other specifications?

USER: I prefer an business class flight in normal-cost airline.

ASSISTANT: Please help me with your name for booking.

USER: Robert Robinson here.

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

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.