You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to attend meeting in CLT. Can you help me in booking flight ticket from IAD?

ASSISTANT: Sure, let me know your travel dates please?

USER: My trip dates are Mar 23 to Mar 25.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you need any other preference?

USER: No.

ASSISTANT: Can I know your name please to proceed further?

USER: Justin Brown here.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.