No,I don't have one.有语法错误吗急!

No,I don't have one.有语法错误吗急!
No,I don't have one.有语法错误吗
急!

No,I don't have one.有语法错误吗急!
一般应该回答
No,I don't have any.
不过,你的回答在语法上应该是正确的
No,I don't have one.不,我没有（一个）.

可以这样说，one作了代词