PHP - Not able to read xml sub node value - php

Question

I am calling this soap API with curl and not able read response value properly so can you please guide me what I am doing wrong.
Here is my code:
$wsdl = "http://xxxx/xxxx/xxxx";
$body = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:par="http://xxxx.com">
<soapenv:Header/>
<soapenv:Body>
<par:cancelReservationReq>
<par:garageID>47</par:garageID>
<par:orderNumber>orderNumber168</par:orderNumber>
<!--Optional:-->
<par:barCode>barCode168</par:barCode>
<!--Optional:-->
<par:orderTime>2015-11-19T00:30:57.905</par:orderTime>
</par:cancelReservationReq>
</soapenv:Body>
</soapenv:Envelope>';
// initializing cURL with the IPG API URL:
$ch = curl_init($wsdl);
// setting the request type to POST:
curl_setopt($ch, CURLOPT_POST, 1);
// setting the content type:
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: text/xml"));
// setting the authorization method to BASIC:
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
// filling the request body with your SOAP message:
curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
// telling cURL to verify the server certificate:
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
// telling cURL to return the HTTP response body as operation result
// value when calling curl_exec:
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
// calling cURL and saving the SOAP response message in a variable which
// contains a string like "<SOAP-ENV:Envelope ...>...</SOAP-ENV:Envelope>":
$result = curl_exec($ch);
// loads the XML
$xml = simplexml_load_string($result);
$soapenv = $xml->children("http://schemas.xmlsoap.org/soap/envelope/");
$tns = $soapenv->Body->children("http://xxxx.com");
echo "success ".$success = $tns->cancelReservationResp->success;
echo "message ".$message = $tns->cancelReservationResp->message;
echo "garageID ".$garageID = $tns->cancelReservationResp->reservations->garageID;
API response data:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body xmlns:s="http://www.w3.org/2003/05/soap-envelope">
<tns:cancelReservationResp xmlns:tns="http://xxxx.com">
<tns:success>true</tns:success>
<tns:message/>
<tns:reservations>
<tns:garageID>47</tns:garageID>
<tns:barCode>barCode168</tns:barCode>
<tns:licensePlate>licensePlate168</tns:licensePlate>
<tns:orderNumber/>
<tns:used>false</tns:used>
<tns:cancelled>true</tns:cancelled>
<tns:startTime>2015-11-20 22:53:45.547</tns:startTime>
<tns:endTime>2015-11-21 22:53:45.547</tns:endTime>
<tns:cancelledTime>2015-11-19 00:51:58.717</tns:cancelledTime>
<tns:checkInTime/>
<tns:checkOutTime/>
<tns:grossPrice>152.6000</tns:grossPrice>
<tns:commFee>162.6000</tns:commFee>
<tns:customerName>customerName168</tns:customerName>
<tns:customerEmail>customerEmail168</tns:customerEmail>
<tns:customerPhone>customerPhone168</tns:customerPhone>
<tns:vehicleMake>vehicleMake168</tns:vehicleMake>
<tns:vehicleModel>vehicleModel68</tns:vehicleModel>
<tns:vehicleColor>vehicleColor168</tns:vehicleColor>
<tns:reentryAllowed>true</tns:reentryAllowed>
</tns:reservations>
</tns:cancelReservationResp>
</soapenv:Body>
</soapenv:Envelope>
I am getting this <tns:success>true</tns:success> value from $success variable but not getting anything from $garageID variable.
Any idea why $garageID is getting blank?
Thanks.