regret, are sorry about
Nosotros lamentamos no poder aceptar su solicitud.
We regret that we cannot accept your request.
We are saddened by his passing.
We don't regret that decision.
We’re sorry we can’t help you.
Lamentamos decirle que no podemos darle tal información.
We regret to inform you that we cannot provide you with that information.
Nosotros lamentamos su muerte.
We mourn his death.
We are saddened by his death.
We’re sorry we can’t help you.