Let an AI voice receptionist answer calls and book appointments

flowchart TD trig>"incoming phone call"]:::trig s0["check calendar availability"]:::svc s1["book update or cancel appointment"]:::task s2["send confirmation email"]:::svc s3[("log call in Airtable")]:::store trig --> s0 s1 --> s2 s2 --> s3 gx{"× what did caller request"}:::gate s0 --> gx p00["book appointment"]:::task gx -->|"new appointment"| p00 p10["update appointment"]:::task gx -->|"change appointment"| p10 p20["cancel appointment"]:::task gx -->|"cancel appointment"| p20 jn{"○ appointment finalized"}:::gate p00 --> jn p10 --> jn p20 --> jn jn --> s1 out[/"appointment booked and confirmed"/]:::out pay{{"handle every call without answering it"}}:::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