"For an appointment arranged for ..."

What could be improved

For an appointment arranged for 3.20pm in the outpatients in Appleton wing,I arrived at 3.05pm.,I waited and waited and waited,until at 4.05pm.I asked a nurse why was I waiting so long?.The reply was there was a delay of 1hour.

Why oh why can common courtesy prevail and something as simple as a messagCould that be e on the notice board tell patients waiting there is going to be a delay.

Could that be over simplifying things or not