Who are you?

If its someone to do with work then i say my name and company name otherwise I dont say anything unless I know why they need to know.. a complete stranger asking me details gets nothing form me unless of course its a pretty woman then i give my first name and a smile and take the rest from there

Well, usually it is a stranger who will ask this question to me. If someone will ask me who am I. Aside from my name, I will tell him/her something that would be interesting to him/her like who are our common friends. I would also tell him a little of my personal background.