Langlas asked you to journey to Bree-town and seek out his captain, a Ranger called Strider. A man named Barliman runs a tavern in Bree and may have more information about Strider's travels.
'Come here, ${PLAYER} and listen well. My captain, a Ranger they call Strider, must be notified of the threat posed by SkorgrÃm. A shame you can't stay to enjoy our victory.
'Travel far to the east, to a place that Men call Bree-town. There you should seek out Barliman Butterbur. He's the owner of a tavern called the Prancing Pony where Strider has lodged in the past. If Strider is there, Barliman can help you find him. If not, you can bed down for the night and you can continue your search in the morn.
'It's a long journey to Bree-land, ${PLAYER}. Do not tarry, for Skorgrim is on the march.'
Find Barliman Butterbur in the Prancing Pony, a well-known tavern in Bree-town. He may know of Strider's current whereabouts or if he's even in Bree-land at this time.