Delete messages/conversations for one user without leaving room or redacting messages

[samnoyes]

I am using MatrixKit to create an iOS application that allows users to privately message each other. Is it possible to delete a conversation locally for just one user without leaving the room? I want users to be able to delete conversations from their own accounts without leaving the room (which would cause the other member to see an "Empty Room" message). Furthermore, if they create a new conversation with the same user after deleting the conversation, the other user should see all of the message history, but the user that deleted that history shouldn't.