You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you aid me to book a flight ticket from ORD to CLT?

ASSISTANT: Sure, can I know your good name please?

USER: Ryan Allen here.

ASSISTANT:  When you are willing to travel?

USER: My trip dates are Mar 26 and Mar 28 respectively.

ASSISTANT: Please share your connection limit.

USER: I prefer for single connecting flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I prefer for business class flight and my depart should be in afternoon.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Thank you.

ASSISTANT: Thank you for availing us.