Create late cancellation policy
Create an option for centers to set a late cancellation policy. For example, students must cancel X minutes/hours before the policy, otherwise it is noted as a "late cancellation." They can still cancel, but after Y # of late cancellations in a given Z # of days, their account will be locked until a center administrator unlocks it. For example, the policy could be that students must cancel at least 1 hour before their appointment or it will be noted as a late cancellation and if they have three late cancellations in 90 days, their account will be locked. They could still cancel up until the appointment time, say 20 minutes before the appointment time, but it would be considered a late cancellation.