Microsofts Bookings

I work for a non-profit organization that partners with other organizations that provide services within schools, daycares, and out-of-school programs. These organizations schedule sessions with schools to come out and implement services, and the services are provided in sessions (generally anywhere from 6-10 sessions). 

We are looking to move platforms and provide an online scheduling experience for our partners and schools in order to ease scheduling between everyone, however, I'm finding it difficult since individual services have to be inputted instead of several sessions at once. Any help with this new process would be greatly appreciated.