Dear Qualiture..
Thanks for your patience... solved
initially i used url:
var serviceUrl = 'proxy/https://sapes1.sapdevcenter.com/sap/opu/odata/IWFND/RMTSAMPLEFLIGHT/';
Finally solved.. Here is service url
var serviceUrl = 'proxy/https/sapes1.sapdevcenter.com/sap/opu/odata/IWFND/RMTSAMPLEFLIGHT/';
model:
var oModel = new sap.ui.model.odata.ODataModel(serviceUrl,false,"username","password");