Received a call in the afternoon.  Caller asked for someone.  I said excuse me and caller hung up.  Tried calling the number back and received this message: an error has been encountered.  Unable to find user for number.  They called back and asked for someone.  I adv that person is not here and to take our number off the list.  She stated she did not get the number from a list and stated she spoke to someone yesterday that advised her to call today.  I said I was the only person here and that I did not speak with her.    She said yes I did and then hung up.