Case study · When & Where
You bring the who. Wendy handles the when and where.
When & Where is an AI event planner named Wendy, built and operated by TONNIC. You pick the crew and the idea; Wendy texts everyone one-to-one, finds the night that works, shortlists restaurants and helps everyone vote, then calls the restaurant to book it — no group chat, no app for your friends.
Designed, engineered, and operated end-to-end by TONNIC AI Agency— conversational planning, one-to-one SMS, and a real outbound booking call stitched into a single consumer product.
Anatomy of a plan
Six steps from a name on the list to a booked table.
- 01
Start a plan
On the site you pick your crew and the idea (dinner, drinks, a night out).
- 02
Wendy texts everyone one-to-one
Each guest gets an individual SMS thread. No group chat, no app to install.
- 03
Finds the night that works
Wendy polls availability and converges on the date the whole crew can make.
- 04
Shortlists and votes on a place
Wendy proposes restaurants and helps the group vote on where to go.
- 05
Wendy calls and books
Wendy places a real outbound phone call to the restaurant and books the table.
- 06
Confirms to everyone
The whole group gets the confirmed plan back.
No app, no group chat
Your friends just get a text.
- Individual SMS threads, one per guest.
- Guests never install an app or create an account.
- Reply STOP to opt out at any time.
- The organiser drives it all from the site.
From idea to booked table
Wendy runs the whole plan end-to-end.
- Automated availability polling.
- Restaurant shortlisting.
- Group voting.
- A real outbound booking call.
- Shared confirmation to all participants.
Built by TONNIC
The engineering work.
- Conversational natural-language planning agent.
- One-to-one SMS orchestration across a group.
- Outbound voice booking calls.
- A multi-party coordination flow (availability → vote → booking → confirmation).
- Consumer front-end.
- Built and operated end-to-end.
How this maps to TONNIC services
What we built for ourselves, we build for clients.
Every technical pattern in When & Where is something TONNIC ships for client projects, too.
AI Voice Agents
The real outbound phone call Wendy places to book the table is a conversational voice agent — the same real-time telephony we scope and build for your business.
Read the service →Automation & Integrations
One-to-one SMS threads across a whole group, availability polling, voting, and a coordination flow that converges on a date. The orchestration plumbing that keeps everyone in sync without a group chat.
Read the service →Web & App Development
A consumer-facing product where the organiser starts a plan and follows it through to a booked table. Real product surface, not a brochure site.
Read the service →
Want one of these for your business?
We build software end-to-end with the same engineers who ship and operate When & Where. Tell us what you have in mind.