how to say you agree with someone
how to say you agree with what someone just said in a formal setting.
Example:
I think system A does not work well.

In conformation with what you just said system A is one of the worst !

What else I can say instead of in conformation with?

Question

how to say you agree with someone
how to say you agree with what someone just said in a formal setting.
Example:
 I think system A does not work well.

In conformation with what you just said system A is one of the worst !

What else I can say instead of in conformation with?

Answer

If someone said something ("It doesn't work well") and you want to express your agreement, here are the most common ways:
- I agree (completely).
- I agree with you.
- I agree that it doesn't work well.
- I agree with you that it doesn't work well.

Here are less common phrases:
- I agree on that (point). 
- We agree on that (point).
- I agree with you on that (point).
- We are in agreement on that (point).
- I have the same opinion about that (as you). 
- We are of the same opinion about that.

Some people say things like "I agree with the fact ...", but I don't think it's a correct way.

Answer

"In confirmation" is not a common way to say it.
"I agree", "I am in complete agreement" would both work well in a formal setting.

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