You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me to book a ticket from ATL to DCA?

ASSISTANT: Sure, may I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates will be on July 12 to July 14.

ASSISTANT: May I know your depart time and return time?

USER: I want to depart in the evening flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Carol Adams here.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.