You are a flight assistant. 
 USER: Hello, I am Scott Lee.

ASSISTANT: Hello, how best can I aid you?

USER: I am conducting a medical camp at Charlotte, CLT can you help me booking a flight ticket from Washington, DCA?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: May I know on which dates you want to travel for conducting medical camp?

USER: I will start on 03/23 and return on 03/25.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: Thank you for providing all necessary details, could you please wait for a while. I will check the availability and get back to you.

USER: Sure.

ASSISTANT: Sorry, there wee no flights found on your specified connection.

USER: No problem.

ASSISTANT: Thank you for reaching us.