Consider the following scenario:
There is an entity in the system, say Document. It can be displayed on the front page of the application (non-conversational state). It can be displayed as an attachment in the pageflow related to the assigned task (conversational state). In both states user is able to click on document and work with it (in nested conversational state). After he/she finished or canceled work, the system returns to the previous state, where user was prior to opening the document. In front page or task-related conversation.
What is the best approach?
Stick the view id of the page you want to return to in the conversation scope.