@VIKAS MISHRA 

Try using below sample script as logic 

var gr = new GlideRecord('sc_req_item'); //replace table name
gr.get('sys_id_of_record'); // replace sys_id of record

 var workflow = new Workflow();
      workflow.cancel(gr);

var newWorkflow = new Workflow();
newWorkflow.startFlow(new Workflow().getWorkflowFromName('Pass workflow name here'), gr, '');

Accept the solution and mark as helpful if it does, to benefit future readers.
Regards,
Sumanth