function deliLineTracker(katzDeliLine = false, name = false) {
   var greeting = [];

  if (name){
          katzDeliLine.push(name);
          greeting.push("Welcome, " + name+ ". You are number " + katzDeliLine.length + " in line.");
          greeting.push("There is nobody waiting to be served!");
  }

   if (katzDeliLine === undefined || katzDeliLine.length == 0) {
          var str = "The line is currently empty.";
  }
  else {
          var str = "The line is currently: ";
          greeting.push("Currently serving " + katzDeliLine[0] + ".");
  }

  katzDeliLine.splice(0, 1);
  greeting.push(str);

    for (var i = 0; i < katzDeliLine.length; i += 1) {
         var index = i + 1;
        greeting.push(index + ". " + katzDeliLine[i]);
    }

  return greeting.join(" ")
}