[pencilneckgeek]

Gerald nailed it.

Even providers I have seen (once or multiple) times, I'll write 'you can reply until 4 today', or 'you can reply any time, private phone' depending on circumstances where I might be hanging with someone.
I've also mentioned 'if it's been more than a couple hours, a simple 'Hey, or Hi' initial return text is 100% fine', just in case I'm out with a friend and they happen to see my phone.

I'll do this with providers I've seen more than once, as I don't know if they're using a work phone, or 1 phone handles all their communications.