Some years ago, I used to share a flat with a friend. The phone was registered in her name. There were all those phone calls with people asking for her by name, and in the beginning I was very polite and helpful and wanted to take a message etc. until I figured out that they were just trying to sell stuff! One day, I just had hung up on two or three of those when within the minute I got another phone call: "This is ... company (I didn't catch their name). Could I speak to [my flatmate], please?" As I just had enough of those kind of people, I said: "She is not here - and if she'd be here, she'd still not buy anything from you!" To my embarrassment it turned out that it was a bookshop where my friend had ordered something and the lady called to let her know it had arrived!