Generic (speech acts)
Meta Question: "What can I say?"
Dialog act Wikipedia
A dialog act is a specialized speech act. For example, Question is a speech act, but Question_on_hotel is a dialog act. Dialog acts are different in different dialog systems. The number of speech acts are commonly recognized, and is stable around 10 or so, the number of dialog acts vary from systems to systems. In some systems, the number of dialog acts can be up to 40.
The research on dialog acts have increased since 1999, after spoken dialog systems became commercial reality.