You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please book a ticket from ATL to IAD to attend Board meeting.

ASSISTANT: Sure, we are pleased to serve you. Can you help me with your trip dates?

USER: My travelling dates are Dec 4 and Dec 6.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you need any break in between your journey?

USER: Yes, I want single connected flight.

ASSISTANT: May I know your specific time to travel?

USER: I am comfortable with any time.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, I am Kenneth Carter.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.