Speaking whilst dreaming?

Hello, a small question to ask.
I began my lucid dream this morning as a WILD and as I initiated the process my girlfriend left the room. Halfway into the dream (as I was still aware of my auditory perceptions to a large extent) I mistook the radio for her entering once more and thought (in my dream):
'My, wouldn't it be intriguing to talk to her whilst dreaming?'
Thus, I attempted to speak and I swear I did. I could hear my voice, which was barely audible. Nevertheless, the reality around me began to become a bit hazy as if I was about to wake up so I ceased my attempt. She wasn't however, in the room (as previously mentioned) and when she did come into the room she promptly woke me up.
My question then is this:
Has anyone else succeeded in speaking whilst asleep and is it at all intriguing to answer questions from an altered state of consciousness?
Thanks for the input : P
-Vincent

I've slept in the same room with people who have talked in their sleep. It's usually annoying for whoever else is sleeping in the same room.

I've never heard of anyone trying to do this... I apologize if this wasn't helpful.