One suggestion is the "Chick Fil-A" method - "My pleasure" :

"Het los hin kip" (here is your food)

"Kogaan, fahdon" (blessings/thank you, friend)

"Frini" or "Dii frin" (my eagerness)

"Laani" or "Dii laan" (my want - what I wanted)

"Smoliini" or "Dii smoliin" (my passion)

Another use for "you're welcome" is "Friend, you're welcome here."

"Fahdon, hin bo het los pruzah" (Friend, your coming here is good - close to the meaning of "welcome")

"Hin kos het pruzah" (Your presence here is good)

"Kosiil pruzah" (Your presence is good)

"Hi laanaan" (You're wanted)

"Hi ni volaan" (You're not an intruder)