One free salon appointment, two interested clients

Define the conflict

In this fictional example, a Friday slot from 14:00 to 15:00 becomes available with a particular stylist. Two clients are waiting for the same service. Sending an invitation is not a booking, and two quick positive replies must not produce two confirmations.

Check suitability first

The workflow checks service duration, the assigned professional and the client's stated availability before making an offer. A 90-minute service does not fit a one-hour gap. A free treatment room does not replace an unavailable professional. Only suitable entries enter the offer sequence.

Make a temporary offer explicit

For this example, the first suitable client receives a time-limited offer. It specifies the date, time, service, professional and reply deadline, and clearly says it is provisional. The salon chooses the actual deadline; this website tool does not promise an implemented reservation timer.

The connected calendar service must recheck availability at confirmation and assign the slot atomically. Repeating the same confirmation must return the same booking rather than create another one.

Handle the other reply honestly

After a successful assignment, close the open offer. A late reply receives a factual explanation and can remain on the waiting list for another suitable time if requested. An expired invitation must never be silently presented as a confirmed appointment.

Acceptance tests in an isolated calendar

• Two nearly simultaneous replies produce exactly one confirmed booking.
• Repeating a confirmation creates no extra booking.
• Expired invitations and slots taken in the meantime are rejected accurately.
• Cancellation releases the resources that were reserved.

The website can prepare this handover. Real reservations and notifications require configured calendar and provider connections. Count successful assignments and conflicts as operational outcomes; the number of invitations sent is not the number of appointments booked.