var config = {

     map: {
        '*': {
            slickjs: 'Hestabit_ReviewRating/js/slick/slick',
            fancyboxhb: 'Hestabit_ReviewRating/js/fancybox/fancybox',

        }
    },

    shim:{
        'slickjs':{
            'deps':['jquery']
        },
        'fancyboxhb':{
            'deps':['jquery']
        },

    }
};

........
<a class="modalbox" href="#inline">click to open</a></p>
...........
<script>
{

require([
        'jquery',
        'slickjs'
        ], function () {
            'use strict';
            jQuery.noConflict();
                 jQuery(function () {
            jQuery('.horizontal-center-home').slick({
                          vertical: false,
                          verticalSwiping: false,
                  dots: false,
                  infinite: true,
                  speed: 300,
                  slidesToShow: 3,
                  slidesToScroll: 2,
                  mobileFirst:true,

                   responsive: [
                        {
                          --------
                          ----
                        }
                  ]
            })
        });
    });

require([
        'jquery',
        'fancyboxhb'
        ], function () {
            'use strict';
            jQuery.noConflict();
                 jQuery(function () {
                         $(".modalbox").fancybox();
                         alert('Triggred'); // its not working
        });
    });
}

</script>