告别
1)Goodbye./ Good night./So long.
2) See you later/tomorrow.
3) Nice meeting you/Nice having you here.
感谢和应答
A:Thank you very much. /Thanks a lot. /Many thanks. / Thanks for helping me./Thanks all the same./Thanks anyway.
B:Not at all. /That's OK /That's all right./ You're welcome. /Don’t mention it./(It’s) my pleasure=A pleasure/ It’s nothing / Think nothing of it//That’s OK.