It's not that code - read the error message:
unknown column 'information_service' in 'where clause' in C:\xampp\htdocs\user-page\user_interface\appointment.php:11
It can't find a column called
information_service
in your DB.
Since none of what you show us references
information_service
the problem is elsewhere in you code where we can't see it.
So start by looking at the file
appointment.php
and specifically at line number 11 - that's where the problem is being reported.