OOO/Vacation auto-response or indicator for @ mentions

Can you guys added some kind of auto response for @ chats. Kind of like an auto response or redirect if someone @ chats you while you are on vacation, OOO, etc.

Yes when you try to @ chat the person it does show if they are online or not. But realistically everyone just @ chats the person knowing they will just respond when they get back from whatever it is they are doing. The person doing the @ chatting does not know how long you will be gone for. It could be anything like lunch 30-60 min or it could be a week or two for vacation. The auto response feature would be awesome because we could write in anything we want like "on vacation will be back xyz date. please contact A, B, C for immediate assistance, etc."