不用谢没关系

对不起 ：
(I am) sorry.
(I am) sorry to trouble you.
Excuse me.
Pardon.
I beg your pardon.

不用谢：
It's my pleasure.
You are welcome.
Don't mention it.
My pleasure.
That's OK.
That's all right.

没关系：
Not at all.
That's all right.
Never mind.
Forget （about） it.
That's OK.
It doesn't matter.

you are welcome 不客气，不用写

it is okay

。。。。。。
用于别人跟你道谢后的客套回答

my pleasure, u're welcome, not at all, don't mention itmy pleasure, u're welcome, not at all, don't mention it是回答谢谢的
That's all right, all right, it doesn't matter, that's ok是回答对不起的

不用谢：You are welcome．
没关系：That's all right.

不用谢：
(1)It's my pleasure.
(2)You are welcome.
(3)Don't mention it.
(4)My pleasure.
(5)That's OK.
(6)That's all right.
没关系：