Replying to a task with conversations creates a mail message, this is confusing and unhelpful as you cannot access the task from there. Mail messages are not tasks. A conversation should happen within the context of tasks. Suggested that when convo and recipient are used, send it to the recipients task box (remain in yours as well) but make it incompletable by that person as it's just a conversation. Tasks stay with tasks. And bold it when there is any change to a task