What are some other ways to respond to someone saying "thank you" besides "de rien" or "vous êtes bienvenue"?

Read also:

• How do I convince my husband that a threesome is okay?
• Delta Force selection is originally based on SAS selection, so why is there no brutal jungle phase for Delta Force? It seems like it's based only on the Brecon Beacons section.
• WhatsApp backs Apple in its legal row with the UK over user data - BBC
• Did Obito ever fully redeem himself in everyone's eyes?
• How does a person become transgender?
• What are some alternatives to wearing a bra? Why do some women feel pressure to wear bras even though there may not be any benefits?
• Why are women attracted to ugly guys?
• If a non-LGBT man (of any age) from a Western country attracts far more mosquitoes than potential dates, what does that say about him?
• While on the surface of the moon, why isn’t the Apollo 11 spacesuit inflated like a balloon from the 3.7 psi internal pressure?
• Why are men ridiculously delusional in the women they want/approach? I'm not a troll. This is a real question. Why does a fat, pot bellied, unkempt, balding, stupid (ergo poor) man, tell a woman above his league that she isn't hot enough for him?
• Why doesn’t the UK change their flag?
• My waist finally looks like how it did before I had kids but I didn’t lose weight. Why am I still 15 lbs from my starting weight?
• How do police officers feel about the fear they instill into criminals?
• Why are German films often so formulaic even though Germany is a European culture? I love them but they follow formula very closely like Hollywood. What are the best German films?
• What are the differences between Republicans and Democrats in their views of the government's role in society? How do these differences impact policymaking?