Large company looking for seminar and participant management

We are a large company in the electrical retail trade and have approx. 50-70 seminars per year. We are looking for seminar and participant management software with the following functions to support our seminar management:

• Query of participants
• Merging the participants into a list
• Forwarding the list to the organizer and/or hotel
• Simple updating of the list
• Consideration of waiting lists
• Cancellation fees
• Participant management

We are not looking for a large portal solution, but a small in-house software.

2-3 software workstations are planned at the head office for administration. In addition, 1 workstation is to be set up in each of 20 branches for correspondence with the head office and for registering participants.