on the ‘edit page’ page, you should have the options to stop comments, below the page editor, a box ‘discussion’ –
if that is not there, click the ‘screen options’ tab near the top right of that page, and tick the appropriate tick box.
at the moment you even have a text pointing to the comment box:
‘Any other general comments may be entered in the box below. Thank you for taking the time to help with this consultation. ‘