error: function (jqXHR, exception)
 { if (jqXHR.status === 0) {
        alert('Not connect.n Verify Network.');
    } else if (jqXHR.status == 404) {
        alert('Requested page not found. [404]');
    } else if (jqXHR.status == 500) {
        alert('Internal Server Error [500].');
    } else if (exception === 'parsererror') {
        alert('Requested JSON parse failed.');
    } else if (exception === 'timeout') {
        alert('Time out error.');
    } else if (exception === 'abort') {
        alert('Ajax request aborted.');
    } else {
      //var test = $.parseJSON(jqXHR.responseText);
        alert('Uncaught Error.n' + jqXHR.responseText);


    }
}
}); here in this jqXHR.responseText gives me response like
{"status":{"statusCode":555,"title":"Please provide the recipient","class":"requestController"}}