Facebook research seems to be taking research into dialogue understanding seriously.
You can read an interesting post HERE that I found looking for research papers authored by Dr. Antoine Bordes.
I see their point in trying to optimize a conversation with a machine and also trying that it might be more friendly, or more human (so to speak) but I don't feel comfortable when technology might be able to understand, some day, in an automated way, a written conversation that I may have with somebody.
May be I see ghosts everywhere (?!)