Absolutely, send us a request for switch via https://successformula.nl/switching-form/ as soon as possible and we will try to find an alternative for you.
We place great importance on our class sizes. However, should you be unable to attend a session, you can switch this multiple times. You will no longer by charged for making switches within your sessions. Additionally, we only reschedule within our capacity, if all our classes are already full we will not be able to move you around.