You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Please assist me in booking a flight ticket from DCA to ATL.

ASSISTANT: May I know your travel dates?

USER: My travel dates are from Nov 15th to Nov 17th.

ASSISTANT: Do youo have any connection limit preferences?

USER: I want a direct flight to travel.

ASSISTANT: Is there any other concern?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Joshua Anderson.

ASSISTANT: No flights found as per your preferences.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.