This idea has been merged into another idea. To comment or vote on this idea, please visit ENTCOM-I-54 Support for threaded conversations.
I have a suggestion. Can you add a comment feature to where people can form a comment thread on a particular message. Ie) A asks B to file a document. Once complete B can comment under A's original message letting A know that the task has been completed. This will be a LOT cleaner, especially for people that have multiple messages with each other.