out of office

I was searching for some plugin to simulate the "out of office" functionality offered by any email provider.

It would be enough to allow user to set a checkbox "out of office" and specify an email text under my/account configuration.
That email text should be sent (to the one modifying the ticket) in case someone assign a ticket to the user and the "out of office" checkbox is set.

Is there any function similar present in any plugin?.
I was not able to find.