What happens if the customer doesn't reply to the first text?

One single follow-up goes out 4 to 6 hours later, with a different angle — for example a concrete appointment slot. After two attempts with no reply, the AI stops for good: the contact is archived and never contacted again. Sends stay within the legal 8 AM–9 PM window, STOP is processed within 24 h, and numbers are never resold or shared.