Thanks for the suggestion, Sunil

Indeed, there are some managers, who simply do not understand 'No' as an answer :/ It could get quite annoying at some point. I myself experienced this with a random guy, who would not stop showering me with offers for a player of mine (I think it was one of my strikers, not sure tho). That's why I can relate and would enjoy a similar feature, which will make my players unavailable for negotiations

I'm forwarding this to the devs!