Yes, Ebbie, I know just what you mean. Very early in the morning I wake and make myself a nice cup of tea. Then I read a bit, sitting up in bed. But occasionally I seem to have heard the phone ringing. I check and there's no record of a call. I expect it's a very short 'dream' while I'm sitting up in bed. And like you, I sometimes hear a conversation or a voice, just mundane things such as "Nice day today!". There's no-one there, and it too must be a brief 'dream'. It could be that our house is haunted, but if so, the ghost is supremely boring and unimaginative. Either that or I'm slowly going bonkers!