It said that native English speakers hardly use "You're welcome"
When they speak to you "You're welcome", they might be staff of shops.
Hovever most Koreans have learned to reply "you're welcome" when someone thank you for your help.
The book said that native speakers usually say "you bet, not at all, sure, no sweat, and no problem."
I guess that I'm not a native speaker so there are many differences from native speakers
How do I study to learn real English?
I think that I need to watch American soap opera.