Call controller action from jquery ajax and capture the result

 [HttpGet]
        public ActionResult SearchResults(string phone)
        {
            
            string recordUrl = "";
            string strurl = String.Format("http://localhost:60045/api/Search/{0}", phone);
            WebRequest requestobj = WebRequest.Create(strurl);

            requestobj.Method = "GET";
            requestobj.ContentType = "application/json";
            {
                using (WebResponse response = (HttpWebResponse)requestobj.GetResponse())
                {
                    string strheader = string.Empty;
                    using (var sr = new StreamReader(response.GetResponseStream()))
                    {
                        recordUrl = sr.ReadToEnd();
                    }
                }
            }
            return Json(recordUrl, JsonRequestBehavior.AllowGet);
        }

$("#btnSearch").on("click", function () {

            var $this = $(this);
            $this.button('loading');
            var searchText = $("#SearchText").val();

            if (searchText == '' || searchText == null || searchText == 'undefined') {
                alert('Mobile number should not be empty');
                $this.button('reset');
                return;
            }
            var serviceURL = '/Search/SearchResults?phone=' + searchText;

            $.ajax({
                type: "GET",
                url: serviceURL,
                //data: param = searchText,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: successFunc,
                error: errorFunc
            }).done(function () {
                $this.button('reset');
            });;

        });

        function successFunc(url, status) {
            var a = url.replace(/\"/g, "");
            window.open(a, '_blank');

        }

        function errorFunc() {
            alert('error');
        }