this should be your base script ....

var answer = false;

var notes = current.work_notes.getJournalEntry(-1);

var currentUser = gs.getUser().getDisplayName();

var na = notes.split("\n\n");

for (var i = 0; i < na.length; i++)

  {

  if(na[i].indexOf(currentUser) != '-1')

  {

  answer = true;

  break;

  }

}

if(!answer)

  {

  gs.addInfoMessage("Fire Event");

}