You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me in booking flight ticket from ORD to CLT?

ASSISTANT: Sure, may I know your good name?

USER: Myself Anthony Jackson.

ASSISTANT: Could I have your journey dates, please?

USER: My trip dates are July 19 to July 21.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in business class.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.