I often will say "you there?" or "you busy?" This means I don't have a single question, it means I want to have a synchronous conversation. There are lots of reasons for the latter. This is what I would prefer people do with me as well, and if I am busy, I feel like I can ignore the message until I have a few minutes to talk (often with voice/phone) I say this as someone working from home, thousands of miles from mos…
Are you available to answer some questions about Docker?
Would you have time to help me with this nginx config?
Do you have time for our 1-on-1?
I try not to say "have a minute" because conversations rarely last a minute or two if we're going to do it voice.
As a manager, I try really hard never to say, "Can we talk?" without context.