YOU SAID:
Thank you so much for lunch
INTO JAPANESE
ランチありがとうございます
BACK INTO ENGLISH
Thank you for lunch
INTO JAPANESE
じゃあね お昼ありがとう
BACK INTO ENGLISH
Bye. Thank you for lunch.
INTO JAPANESE
じゃあね お昼ありがとう
BACK INTO ENGLISH
Bye. Thank you for lunch.
That didn't even make that much sense in English.