Featured case study
Grace: giving a health system a voice
Grace is an AI voice assistant that helps patients manage appointments — verify, schedule, reschedule, and cancel — without pretending to be human. Behind it: the persona, tone ladder, and conversation design standards in the Helix design system, plus the voice, chat, and SMS flows behind it.
Design standards
Voice flows
Pattern library
2-min video
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“This is Grace, an AI-powered assistant ready to help with scheduling, rescheduling, canceling, and verifying appointments.”
Opening line, Grace voice flow. One persona, three modalities, zero first-person pronouns.