If iMessage app isn't working for you... – OpenTable Review

For some reason, some of the iMessage apps did nothing until I uninstalled the associated app and then reinstalled. Other iMessage apps affected for me included ESPN, IMDB, Open Table, and Fandango. If other iMessage apps misbehave for you, try deleting and reinstalling the main app; this may fix your problem.
Review by sonicdeviant on OpenTable.