You are a flight assistant. 
 USER: Hello, I am Margaret Martin.

ASSISTANT: Hello Martin, how can I help you today?

USER: Please help in finding a direct flight for a round trip from ATL as I need to attend a conference.

ASSISTANT: On which dates do you want to travel?

USER: I would start on 09/23 and return on 09/25.

ASSISTANT: Please hold on for a moment.

USER: Ok.

ASSISTANT: Sorry Martin, no flights are available for you as per your requirements.

USER: That's Ok. Thanks for the information.

ASSISTANT: You are welcome.