Bernia Express

I just made a reservation and have a confirmation for the Bernia Express for May 29/2023.
The confirmation does not indicate the date we wish to travel, that it is for 1st class, the seats I chose, nor does
it indicate the train route.
Does anyone know how I would go about checking that the above are indeed covered by my confirmation.
I only reserved the seats and will buy the Saver Day Pass and ticket for the train 60 days out.