Knowing your dreaming

Did a little test this week, twice.  I was dreaming and suddenly I realized that I was dreaming, there where people there chatting about something and I was wondering if I could say to them that I was dreaming. I walked at a desk where a receptionist was working and started to talk to here, asked where she lived and stuff but the only thing that I got out of here was just nonsense. So I said to here "Hey listen you know that I´m dreaming and you are in my dream", she stared at me wondering if I was going crazy. I´m not going in details what happened next. ;) But I had control and did everything I wanted, awesome dream.