I am working as software developer. My manager is so busy with lot of things. He would like to discuss with me some thing about current project. But since he has higher priority meetings he asked me, is it OK to have telephonic discussion after office hours like 8pm around that time. I am OK for that request this time. But I don’t want my manager take this granted and come up with these kind of requests more often.
How can I pass this message to my manager professionally?