No Interest
Not Interested
expression
興味 is interest in something. If you do not have (がない) that interest, then you have no interest or you're not interested.
きょうみがない
Reading comes from the on'yomi as well as 興味.
俺は顧客と個人的に仲良くなることには興味がないんだ。
I’m not interested in building personal relationships with customers.