The Levite speaks with a tone of deference, referring to himself, his concubine, and the young man as your servants.
This may be surprising, given the lack of humility we have seen so far in the Levite. But perhaps the deference is there because he and his party are at the mercy of the old man.
19 We have straw and feed for our donkeys, with bread and wine for me and your female servant and the young man with your servants. There is no lack of anything.”