When you make a direct booking, it is indeed not possible to change the dates of stay. The direct booking system does not allow you to change the arrival and/or departure date, because availability for the desired date(s) must be checked again.
We recommend in this case to check availability for the new date and book it before canceling the old booking.
If you would like assistance with this please contact us at reserveringen@meetingselect.com or at +31 (0)88 00 33 604.