job referrals

I just received a call from a company which I haven't heard about. Probably they are new and just starting to branch out. Don't get me wrong, I don't mind being referred for a job (as it only shows how you believe in me) but please inform me before you send my number to them. I don't want to take business calls unprepared. I was shocked when I answered the call. I don't know what I will say to the person I'm talking to. I don't even know the nature of their proposal. Well, I still want to say thanks for referring me whoever you are. I might try the company and meet with the person who called me (idk her position).