The Broker that showed the property ...

Last week I called a broker regarding a short sale, and she then showed me that one and some more in the same building. I also asked her if she had any in a couple of other buildings, and never heard back from her either with the requested information or to find out if I am interested in the ones she showed me. I don't want to work with someone who does not have the initiative for basic follow-up. Or is his normal behavior for a broker? More importantly is there any obligation to work with her if I want to move on any of the units she "introduced" to me? Also can I contact the owners directly if I am able to find out who they are (only under the above scenario - not otherwise)?