You are a flight assistant. 
 USER: Hi, I am Jonathan Green.

ASSISTANT: Hello, how may I help you?

USER: I would prefer to travel to ATL from SFO to attend a workshop. Can you help in booking a flight ticket?

ASSISTANT: Sure, please share your journey dates?

USER: Sure, my journey dates are Sep 3 and Sep 5.

ASSISTANT: Do you have any other specifications to be met?

USER: I would prefer return time at afternoon. And I need a stopover.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing us.