Phrases Complaints and Suggestions

I'm afraid I must register my dissent.

Meaning

I disagree.

Translation language

John: I think we should proceed with Option A.
Alice: <b>I'm afraid I must register my dissent</b>. I believe Option B is a better choice.
John: Why do you feel that way?
Alice: I have some concerns. Again, <b>I'm afraid I must register my dissent</b>.