let input =$("<input type='text'/>")
  .appendTo('#dynamic-form-elements');
  input.autocomplete({
     source: [] // Initially empty
  }).on('input', function () {
    $.ajax({
        url: "https://lookmeup/json/person/" + input.val(),
        dataType: "json",
        success: function (parsed_json) {
            let people = [];
            let results = parsed_json.data;
            for (i = 0; i < results.length; i++) {
                people.push(results[i][1])
            }
            console.log(people)
            input.autocomplete('option', 'source', people);
        }
    });
})