Your 4 sessions are meant to be used within a month, but life happens - you can use them flexibly within 8 weeks from the first session. After that, any unused sessions will expire.
You can reschedule a session with at least 8 hours notice - no problem at all.
- Late cancellations & no-shows:
If you miss a session without warning, it’s considered used - but I always try to be flexible if something urgent comes up.