In the case of lost tracking, a default text message will be displayed. The default message is "Gaze around to scan the scene”.
To replace it with another dialog, add a new object(s) with the name "Lost-tracking-dialog (active):
That object will be shown instead of the default message if one of the dialogs has the “active” attribute.
To change the currently active dialog, perform the Playmaker command ChangeLostTrackingDialog with the name of the dialog.