A woman who spent $8,000 setting up a Dial-A-Friend phone service received only one call in three months. And that was from a man who wanted to know her measurements. Lorain Blum advertised on radio, cable television and in singles' magazines, but her sole customer brought in a total of $23.92 at $2.99 a minute. Those results surprised Eric Cherry of ICN Corp., which operates 900 numbers in South Florida. "One call in three months _ I've never heard of that," Cherry said. "You get more calls than that by accident." Ms. Blum said she intended the phone line to make social service referrals and simply lend an ear to anyone seeking a friend. "It makes you wonder: Is there a normal person out there to begin with?" she said.