Spark message window

Is there any setting in Spark that allow me to show one user incoming message in one dialog window?
That means one user incoming message in one window, two users incoming messages in two windows, etc.
At this moment, all the incoming message from different users are shown in single dialog window. If I close it accidentally (I haven’t read all the messages), I cannot find out who has sent message to me. Thank you.

No, Spark only works in a tabbed mode. If you closed some chats accidentally you can try checking contacts you have chatted last. But it will only show contacts that you have replied at least once. Shortcut is Ctrl+E (it is described in the user guide available in the Help menu).