Professionally ignore people with style.

The timing of your email is spectacularly unfortunate for both of us. I am on holiday and busy making terrible hydration choices. If this involves a table, a room, or a complaint, start with the current supervisor. I will get back to this once I return and the panic cools down. If the issue is urgent, call the venue rather than emailing into the abyss. I appreciate your flexibility with this avoidable surprise.