UFAL-DSG/alex — pull request #23 by tuetschek (2013-12-03 15:48:26+00:00)
Title: Generate a random backoff action when we don't know what to do

In case the dialogue state has not changed very much and we don't have any slots to request, the system will generate a random 'backoff' dialogue act, such as `irepeat()`, `notunderstood()`, `reqmore()` or, in most cases, `silence()`.