Use the casual one with close friends. Use the polite one with teachers, seniors at work, or people you don't know well.
Casualありがとうarigatou
Politeありがとうございますarigatougozaimasu
ありがとう is fine with friends and family. Add ございます when speaking to a senior, a customer, or someone you respect.
Casual大丈夫だよdaijoubu da yo
Polite大丈夫ですよdaijoubu desu yo
Both mean it's okay. The casual one is for friends, and the polite one is for people you are less close to or should show respect to.
Culture tip
In Japan, being a few minutes late is common, but you should always apologize first. When you receive a gift, saying thanks and offering to treat your friend is a friendly, natural way to show appreciation.
Ready to say it out loud?
On Tuned you can practice this scene in 3 steps: copy the model, build it up bit by bit, then role-play with an AI partner — at your level.