Displaying a message when there are no results from an XSL Query

Question

Using MM_XSLTransform.class.php
I am querying an XML file to produce a list of places whose town name or address match a letter of the alphabet. The letter is passed as a variable in a URL.
XSL:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xsl:param name="letter"/>
<xsl:output method="html" encoding="UTF-8"/>
<xsl:template match="/">
<xsl:for-each select="dataroot/CPINFOWEB[Town=starts-with(Town, $letter) or Name=starts-with(Name, $letter)]">
      <table width="100%" border="0" cellspacing="0" cellpadding="0">
        <tr>
        <td>
    <a href="detail.php?park={CostCode}"><xsl:value-of select="Name"/></a><br />
          <a href="detail.php?park={CostCode}"><xsl:value-of select="Town"/></a><br />
      <xsl:value-of select="Address"/><br />
      <br />    
      </td>
        </tr>
      </table>
      </xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Destination PHP file:
setXML("../regions/CPINFOWEB-mobile.xml"); $mm_xsl->setXSL("list.xsl"); $mm_xsl->addParameter("letter",$_GET['letter']); echo $mm_xsl->Transform(); ?> 
The result Name and Town are displayed as a URL to link to a "more details" page.
All works fine, but when there are no results for a letter of the alphabet I obviously get a blank page.
How do I display a "no results" message instead

Answer 1

I deleted my original reply because the formatting of the XSL code was messed up by the forum. Here's trying again:
Your current code creates a new table for each result. The opening and closing <table> tags should be outside the the <for-each> loop. To deal with the possibility of no results being found, use a conditional statement and the count() function like this:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xsl:param name="letter"/>
<xsl:output method="html" encoding="UTF-8"/>
<xsl:template match="/">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<xsl:for-each select="dataroot/CPINFOWEB[Town=starts-with(Town, $letter) or Name=starts-with(Name, $letter)]">
        <tr>
        <td>
    <a href="detail.php?park={CostCode}"><xsl:value-of select="Name"/></a><br />
          <a href="detail.php?park={CostCode}"><xsl:value-of select="Town"/></a><br />
      <xsl:value-of select="Address"/><br />
      <br />    
      </td>
        </tr>
</xsl:for-each>
<xsl:if test="count(dataroot/CPINFOWEB/Town) &amp;lt; 1">
    <tr>
    <td>No records found</td>
    </tr>
    </xsl:if>
</table>
</xsl:template>
</xsl:stylesheet>