I wrote a request xsl that transforms an xml request to another one but it doesn't work as expected

The Request in xml is :

 <NS2:BookTicket xmlns:NS2="http://ift.tt/1w8OOy4">
      <NS2:transaction_header>
        <NS3:Ticket_id xmlns:NS3="http://ift.tt/1uV1mym">
        1993</NS3:Ticket_id>
        <NS4:request_datetime xmlns:NS4="http://ift.tt/1uV1mym">
        2014-11-04T15:26:27</NS4:request_datetime>
        <NS5:request_reference_no xmlns:NS5="http://ift.tt/1uV1kXe">
        141104165416</NS5:request_reference_no>
        <NS6:send_sms xmlns:NS6="http://ift.tt/1uV1kXe">
        N</NS6:send_sms>
        <NS7:send_sms_language xmlns:NS7="http://ift.tt/1uV1kXe">
        en</NS7:send_sms_language>
      </NS2:transaction_header>
      <NS2:transaction_body>
 <NS2:idn>00201220202121</NS2:idn>
        <sss>2570778508</sss>
              </NS2:transaction_body>
    </NS2:BookTicket>

The output xml that is expected (That I want) is :

<Root>
<numberid1>00201220202121</numberid1>
<numberid2>2570778508</numberid2>
</Root>

(I want to extract the value inside idn and put it in a new element in the transformed xml request called also I want to extract the value insides sss and put it in a new element in the transformed xml request called )

I wrote this request xslt:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://ift.tt/tCZ8VR"
    version="1.0"
    xmlns:xalan="http://ift.tt/w7zGWI">
    <xsl:template match="/">
        <xsl:element name="Root">
            <xsl:choose>
               <xsl:when test="*//BookTicket">
                    <xsl:element name="numberid1">
                        <xsl:value-of select="*//idn" />
                    </xsl:element>
                               <xsl:element name="numberid2">
                        <xsl:value-of select="*//sss" />
                    </xsl:element>
                </xsl:when>
            </xsl:choose>
        </xsl:element>
    </xsl:template>
</xsl:stylesheet>

The Actual transformed xml after applying xsl is : Why can't it find the BookTicket or create the new elements? is it something related to namespaces?