Send personalized WhatsApp offers 10 days after purchase

flowchart TD trig(["daily invoice age check"]):::trigtime s0["check invoices from 10 days ago"]:::task s1["pull customer name and phone"]:::svc s2["ai writes personalized message"]:::task s3[["send whatsapp message with pause"]]:::mi trig --> s0 s0 --> s1 s1 --> s2 s2 -->|"one per one per invoice from 10 days ago"| s3 out[/"personalized discount messages sent to buyers"/]:::out pay{{"reengages customers without manual work"}}:::pay s3 --> out out --> pay classDef task fill:#e7f6fe,stroke:#34b8f0,color:#2c2a29 classDef svc fill:#f6f8fa,stroke:#7c8795,color:#2c2a29 classDef mi fill:#e7f6fe,stroke:#0079a8,color:#2c2a29,stroke-width:2px classDef human fill:#fff,stroke:#0079a8,color:#0079a8 classDef store fill:#f6f8fa,stroke:#0079a8,color:#2c2a29 classDef trig fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigtime fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigdata fill:#8ad4f5,stroke:#0079a8,color:#06314c,font-weight:bold classDef gate fill:#fff,stroke:#e8a23d,color:#6b4708,font-weight:bold classDef out fill:#1f9d6b,stroke:#167a53,color:#fff,font-weight:bold classDef pay fill:#06314c,stroke:#021f33,color:#fff