When this happens...
ScheduleOnceCanceled Booking
Then do this...
SlackSend Channel Message

Oh no, someone canceled a booking! On top of that, because you're busy, you didn't even realize until it was too late. Well, with Zapier, you can get notified in Slack any time a ScheduleOnce booking is canceled.

How this ScheduleOnce-Slack integration works:

  1. Bookings are canceled in ScheduleOnce
  2. Zapier sends a notification through Slack

Apps involved

  • ScheduleOnce
  • Slack

Why Zapier?


Get started for free—14 day trial of premium features and apps.


No coding required—automate any of 1,000+ apps in minutes.


Enterprise-level security—connect mission-critical apps.

It's easy to connect ScheduleOnce + Slack and requires absolutely zero coding experience—the only limit is your own imagination.

When this happens...
then do this!
Completed Booking

Triggers when a booking is completed. Specifically, when the time window of the booking has passed.

Send Direct Message

Send a direct message to a user or yourself from the Slackbot.

Rescheduled Booking

Triggers when a booking is rescheduled.

Send Channel Message

Post a new message to a specific #channel you choose.

Scheduled Booking

Triggers when a new booking is scheduled.

Add Reminder

Adds a reminder for yourself or a teammate, just like the /remind slash command.

Canceled Booking

Triggers when a booking is canceled.

Set Channel Topic

Sets the topic on a selected channel.

Booking Lifecycle Event

Triggers when a booking status is changed to one of the following: Scheduled, Rescheduled, Canceled, Completed, or No-show.

Set Status

Sets your Slack status to the given text and emoji.

Use our free platform to build a single Zapier integration and instantly connect your app with 1,000+ others.

Become a Zapier Integration Partner

ScheduleOnce is an end-to-end solution for scheduling with prospects and customers through all phases of the customer lifecycle.

Slack is a platform for team communication: everything in one place, instantly searchable, available wherever you go. Offering instant messaging, document sharing and knowledge search for modern teams.

See Slack Integrations