What's the difference between Arigatou Gozaimasu and Arigatou Gozaimashita?

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Tags

1. #setting
2. #common
3. #second
4. #arigatou
5. #gozaimashita
6. #superior
7. #someone
8. #social
9. #transaction
10. #formally
11. #there
12. #addressing
13. #would
14. #thank
15. #gozaimasu
16. #service
17. #something
18. #saying
19. #phrase
20. #first
21. #office