Well, a half cadence is where the last chord played in a phrase spells out the Dominat chord of the key signature played in. For example this Lament is in the key of C, the first ending has an E to a G. It could be harmonized by making the E the third of the root chord, C, #and the G as the root of the dominat chord. This would be a half cadence as the I moves to the V and does not resolve back to the one. Try it, play an F chord, #a C chord and then play a G chord and listen for what you want to happen next.
The last two cadences in the piece are both Authentic cadences. The only chords they could go to in this type of song would be the I, the C.
Without Love in the Dream it will never come true.