如何从ajax数据创建jquery数组？

Question

I wanna create array from ajax response. I took array from ajax and i have to create dynamic data for chips materializecss autocomplete

response from ajax

var tag = '';
$(document).on('keyup', '.tags', function() {

    var _this = $(this).val();

    if(_this.length > 1) {

        $.ajax({
            url: '/story/searchTags',
            type: 'POST',
            dataType: 'JSON',
            data: {
                tag: _this
            },
            success: function(tags) {
                tag = tags;
            }
        });

    }

});

$('.chips-placeholder').chips({
    placeholder: lang_('Your tag'),
    secondaryPlaceholder: '+ tag',
    autocompleteOptions: {
        // I need data like this from response
        data: {
           'Google', null
           'Googol', null
        },
        limit: 5,
        minLength: 2
    }
});

<div class="chips chips-placeholder chips-autocomplete input-field" style="background:#fff">
   <input class="input tags" placeholder="tag" autocomplete="off" />
</div>

that's my code

Finally, thanks to @Vel to find right answer. jsfiddle - work code