You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I want to reserve a flight from ATL, as I have my brother's wedding event at DCA. Can you please help me out with it?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: Thank you, my travelling dates are Aug 15th and Aug 17th.

ASSISTANT: May I know your name for further process?

USER: I am Carol Harris.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I prefer a single connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Ok, sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.