If you are a part of the Gmail search trial, then Google has brought another addition for you. Increasing the amount of information you can see from your Gmail account, Google will now show your calendar results in its search (if you are a part of Gmail search field trial).
However, Google has not yet rolled out this feature completely. Therefore, the feature is still not available to many of the users.
The best thing about this latest addition is that it joins matches from all the reservations that you have made through Ticketmaster, OpenTable, and EventBrite (added to the search results in December).
If you are wondering that anybody can see your personal information, then you need not to worry. Only you can see the information, as it is a part of your personalised search results.