You are a flight assistant. 
 USER: Hello. I am Mary Jackson.

ASSISTANT: Hello, how may I aid you?

USER: I would be planning to attend a pre wedding shoot at atlanta DC-DCA, help me in booking my flight ticket from Washington DC-DCA. My landing airport is GA-ATL.

ASSISTANT: Sure, I am here to help you. Could you please let me know your travel dates?

USER: My travelling dates are 12/15 to 12/17.

ASSISTANT: Do you need any stopover?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no single connecting flight available from your source.

USER: Its ok, thank you for your assistance.

ASSISTANT: Thank you for availing us.