I'm afraid...
A2
used to politely introduce bad news or to politely disagree with someone
Dictionary examples:
I'm afraid your homework ate my dog. (0.0)
I'm afraid your bed has gone on vacation without you. (0.0)
I'm afraid your book has joined a secret reading club. (0.0)
I'm afraid (that) we can't come this evening after all. (14.9)
I don't agree at all, I'm afraid. (14.9)
This is your room - it's a bit small, I'm afraid. (18.1)
I'm afraid I disagree with you. (20.6)