Official Solution & Step-by-Step Guide:

【Official Architecture & Standard Operating Procedure】 SOP splits customers into five funnel stages — cold / warm / hot / deal / lost — with different follow-up scripts, frequency, and intervals per stage, not one generic blast to everyone. Intervals are computed dynamically based on the customer's last reply time: the first silence typically gets a longer wait (giving the customer room to respond), and subsequent gaps grow progressively to avoid repeated nagging in a short window. Each follow-up message is personalized using the customer's profile memory (needs they've mentioned, timezone, preferences), not a copy-pasted template, so it reads more like a real human checking in. The moment a customer replies, the current follow-up cadence is immediately interrupted and the stage is re-evaluated — you'll never see the AI keep messaging on the old schedule after the customer has already responded. Each account can set a maximum number of follow-up attempts and auto-mark as lost on timeout; once the cap is hit, follow-up stops automatically and the lead is handed to a human for review rather than being pestered indefinitely.