You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Could you please reserve my flight ticket from DCA to ATL?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are Aug 5th and Aug 7th.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I will prefer to travel in business class.

ASSISTANT: May I know your name please?

USER: Kathleen Evans.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.