Hi,
Yes I had similar dream once. It was kind of freaky though. Once we had a band master from the brass band I used to play with and he was dying with cancer in hospital. The weird bit was I hardly knew him and I had a dream that someone spoke to me and told me that he died at hospital at 10am in the next morning. Anyway I woke up and told my family this. at 10.30am we had a phonecall from hospital saying that he died at 10am. The freaky part was that my dream was right.

Im not sure why and who spoke to me. I believe in god to maybe gods angels spoke to me to let me know. My family were shocked that my dream told me about his death. It was kind of freaky though.