Hello Kazuki,

Thank you for purchasing Amelia, and for reaching out to us.

You can do it in two ways:

1. You can create two different services one that will allow five people next Wednesday but 10 on Thursday.

Or

2. You can manually change the maximum number of people after each appointments.

We suggest the first option because it's a lot easier but it is entirely up to you.

If you have any more questions please feel to open another ticket.