Maliriel has asked you to help her companions finish the prepartions for the upcoming banquet.
'You are here to help with the preparations for tonight's feast? Ah! We shall make the night glow with lantern-light.
'The lanterns line the path on the other side of this gate. When night falls, I would like you to light them for me.'
There are lanterns along the path between Imlad Lalaith and Caras Galadhon. Wait for night fall, and then light them to help lead revellers to the feast.
As part of the preparations for the evening feast, Galhíril would like you to light the lanterns that will lead the evening revellers to the banquet.
Galhíril is at Imlad Lalaith.
You should return to Galhíril with your report.