Stacoverflow site link >>> https://stackoverflow.com/questions/10495574/target-the-last-word-within-an-h1-element

Define first word and last word with span tag.js

$('.book-consultation em a').html(function(index, curHTML) { // This function for select last word
   var text = curHTML.split(/[\s-]/),
       newtext = '<span class="last-word">' + text.pop() + '</span>';
   return text.join(' ').concat(' ' + newtext);
 });

// Another way to select First word and last word =========================
$("#lastWord").html(function(){ // Class or id can be use
  var text = $("#lastWord").text().split(" "); // All text convert to array.
  var last = text.pop();  // Select last wrod.
  var first = text.shift(); // Select first word.

  var firstW = first.innerHTML = '<span class="firstWord">' + first + '</span>'; // Make wrapper of first wrod
  var lastW = last.innerHTML = '<span class="lastWord">' + last + '</span>'; // Make wrapper of last wrod.
    
  return firstW + " " + text.join(" ") + " " + lastW ;
});