copy3.xml

	<bpel:copy>
		<bpel:from header="echo" variable="input"></bpel:from>
		<bpel:to header="echo" variable="output"></bpel:to>
	</bpel:copy>

response.xml

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <soapenv:Header>
      <echo xmlns="http://example.com/" xmlns:eh="http://example.com/" xmlns:sam="http://wso2.org/bps/sample">hello</echo>
   </soapenv:Header>
   <soapenv:Body>
      <soapHeaderTestProcessResponse xmlns="http://wso2.org/bps/sample">
         <tns:result xmlns:tns="http://wso2.org/bps/sample">result</tns:result>
      </soapHeaderTestProcessResponse>
   </soapenv:Body>
</soapenv:Envelope>