csrf token is not getting updated in codeigniter

Question

csrf tocken is not get updated after success function when alerted the same value is alerted

$.ajax({
       url: '<?php echo base_url()?>home/get_checkin',
       type: 'POST',
       data: {value: id},
       dataType: "json",
       success: function(data) 
         {
         alert($.cookie(csrf_cookie_name));
         $('#csrf').val($.cookie(csrf_cookie_name));
     $.ajax({
               url: '<?php echo base_url()?>home/get_services',
               type: 'POST',
               data: {value: data.checkin[0].check_in_unique_id},
               dataType: "json",
               success: function(data1) 
                {
                    alert($.cookie(csrf_cookie_name));
                $('#csrf').val($.cookie(csrf_cookie_name));
                }
               }); 
         }
      });