XSLT: Generate CSV file with .CSV extension

Hello,
I want to generate .csv file using XSLT.

I am getting .txt file using the below XSLT, i want .CSV file from the below XSLT...

Any idea how to do that?

Here is my XSLT:

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:csv="csv:csv"
xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl">
                        
      <xsl:output method="text" encoding="iso-8859-1"/>

      <xsl:key name="kRequestId" match="/VCAResponse/Response" use="RequestId"/>

      <!-- DL being used (Comma in this case) -->
      <xsl:param name="DL" select="'&#44;'"/>

      <!-- Checking for carriage return -->
      <xsl:param name="CR" select="'&#xA;'"/>

      <xsl:strip-space elements="*"/>

      <!-- Column Headers -->
      <!--Create header row of element names
            (All fields are sent to JDE that are in the CIM, single line per request details)-->

      <!--
      IssuerId
      FileId
      RequestId
      Action
      PurchaseId
      Status
      AVV
      Expiry
      PAN
      ErrorCode
      ErrorMessage
      SupplierPaymentNotificationEMail
      PurchaseSupplierNotificationEMail
      PurchaseSupplierNotificationAutoSend
      -->

      <xsl:variable name="headers" >
            <headers>IssuerId</headers> <!-- 1 -->
            <headers>FileId</headers> <!-- 2 -->
            <headers>RequestId</headers> <!-- 3 -->
            <headers>Action</headers> <!-- 4 -->
            <headers>PurchaseId</headers> <!-- 5 -->
            <headers>Status</headers> <!-- 6 -->
            <headers>AVV</headers> <!-- 7 -->
            <headers>Expiry</headers> <!-- 8 -->
            <headers>PAN</headers> <!-- 9 -->
            <headers>ErrorCode</headers> <!-- 10 -->
            <headers>ErrorMessage</headers> <!-- 11 -->
            <headers>SupplierPaymentNotificationEMail</headers> <!-- 12 -->
            <headers>PurchaseSupplierNotificationEMail</headers> <!-- 13 -->
            <headers>PurchaseSupplierNotificationAutoSend</headers> <!-- 14 -->
      </xsl:variable>      

      <xsl:variable name="columns" >
            <columns>IssuerId</columns> <!-- 1 -->
            <columns>FileId</columns> <!-- 2 -->
            <columns>RequestId</columns> <!-- 3 -->
            <columns>Action</columns> <!-- 4 -->
            <columns>PurchaseId</columns> <!-- 5 -->
            <columns>Status</columns> <!-- 6 -->
            <columns>AVV</columns> <!-- 7 -->
            <columns>Expiry</columns> <!-- 8 -->
            <columns>PAN</columns> <!-- 9 -->
            <columns>ErrorCode</columns> <!-- 10 -->
            <columns>ErrorMessage</columns> <!-- 11 -->
            <columns>SupplierPaymentNotificationEMail</columns> <!-- 12-->
            <columns>PurchaseSupplierNotificationEMail</columns> <!-- 13 -->
            <columns>PurchaseSupplierNotificationAutoSend</columns> <!-- 14 -->
      </xsl:variable>      

      <!--Invoice hierarchy structure of Invoice/InvoiceLineItemDetail is flattened into a single line per InvoiceLineItemDetail-->
      <xsl:template match="/">
      
            <!--Create header row of attribute names-->
            <xsl:for-each select="msxsl:node-set($headers)/headers">
                  <xsl:text>"</xsl:text>
                  <xsl:value-of select="."/>
                  <xsl:text>"</xsl:text>
                  <xsl:if test="position() != last()">
                        <xsl:value-of select="$DL"/>
                  </xsl:if>
            </xsl:for-each>
            <xsl:value-of select="$CR"/>
            
            <xsl:for-each select="/*/*">
                  <xsl:variable name="NodeName" select="name(current())"/>
                  <!-- If node is Response, get the values based on their element name (from the columns above -->
                  <xsl:if test="$NodeName = 'Response'">
                        <xsl:variable name="property" select="ancestor-or-self::node()|descendant::node()"/>
                        <xsl:for-each select="msxsl:node-set($columns)/columns">
                              <!-- Extract the column name and value -->                  
                              <xsl:variable name="column" select="."/>      
                              <xsl:variable name="value" select="$property/*[name() = $column]"/>            
                              <xsl:text>"</xsl:text>
                              <xsl:value-of select="$value" disable-output-escaping="yes"/>
                              <xsl:text>"</xsl:text>
                              <xsl:if test="position() != last()">
                                    <xsl:value-of select="$DL"/>
                              </xsl:if>
                        </xsl:for-each>
                        <xsl:value-of select="$CR"/>
                  </xsl:if>
            </xsl:for-each>

      </xsl:template>

</xsl:stylesheet>


Thanks