script will look like this

(function process(/*RESTAPIRequest*/ request, /*RESTAPIResponse*/ response) {

	try {
		var arr = [];
		var itemName = request.pathParams.itemname;
		var ritm = new GlideRecord("sc_req_item");
		ritm.addQuery("cat_item.name", itemName);
		ritm.setLimit(2);
		ritm.query();
		while(ritm.next()) {
			arr.push(ritm.getValue('number'));	
		}
		var responseBody = {};
		responseBody.data = arr;
		responseBody.status = "Success";
		response.setBody(responseBody);
	}
	catch (ex) {
		var message = ex.message;
	}

})(request, response);