XSLT output not as expected

Question

I have a requirement to remove parent xml nodes and copy entire xml inside node. I have written a xslt code it, however, it is not working as expected.

Input XML:

Answer 1

In XSLT 2 or 3 you can use

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    exclude-result-prefixes="#all"
    version="3.0">

 <xsl:template match="/">
     <xsl:copy-of select="//ns3:Response" copy-namespaces="no" xmlns:ns3="urn:enoc.com:HTRUAE:EmployeeLeavesData_Portal"/>
 </xsl:template>
 
</xsl:stylesheet>