Hack with confidence.
Page conference-room-lookup.php is vulnerable to at least the following:
Information Disclosure: This page gives away internal system information, configuration information, paths, filenames, or other private information.
Method Tampering: Because the page does not specify that the input parameters must be posted, it is possible to submit input parameters via a post or a get. This is a second order vulnerability allowing other vulnerabilities to be exploited easier.
LDAP Injection: This page is vulnerable to LDAP injection.