I have received an email from the "director" of a prestigious research institute, sent to me and another candidate, announcing and congratulating that we have been shortlisted for a particular position. He then mentioned that his assistant will contact us to inform us about the interview procedure and the next steps.
I wonder if I have to reply to the email, given it is sent by the director with his e-mail and not his assistance, or administration email, or I have to consider it as a kind of public announcement and just wait for his office to contact me?