You may be looking for information about the Millennium Group member, Finley.

Agent Finley was a member of the Federal Bureau of Investigation assigned to Special Investigations. In 1993, while Special Agent Dana Scully was passing through the bustling bullpen hallway in the J. Edgar Hoover FBI Building, Agent Finley introduced himself during a phone call that could be heard in the same work area. (TXF: "The Jersey Devil")

Besides being audible in the episode, the words used by Agent Finley to introduce himself appear as part of the episode's subtitles in the The X-Files' Season 1 DVD.
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