On the Quiet Streets of Neverwinter:
SpoilerYou can recall the map from when you first came into town. The Dragon's Lair was a tourist site that was flagged as a point of interest for travelers. You aren't far from the main streets and could navigate back to the Dragon's Lair with relative ease.
At the Dragon's Lair:
SpoilerThe half-elf nods, "5 copper each."