pnr_created - pnr_created means that consumer was redirected to the payment site but did not complete payment process (e.g. closed a browser's window) - you do not have to report it to the technical support. Another example is that there might be supplier internal interruption or error and a booking was initiated but never concluded and confirmed. Please note that a reservation with status pnr_created cannot be cancelled as this is not a confirmed or concluded booking, so there is nothing to be cancelled.
book_pending - something went wrong, please contact technical support.
cancel_failed - something went wrong, most probably supplier had some issues during cancellation process (CRS error). Please report the problem to the technical support.
book_confirmed - booking successfully concluded and confirmed.
cancel_confirmed - cancellation process went smooth, everything is ok.