You can make the other person happy by calling them. Its oneself who may think its disturbing for the other. I am sure most people have slack messages coming al

You can make the other person happy by calling them. Its oneself who may think its disturbing for the other. I am sure most people have slack messages coming all the time and that is not disturbing. One can in the same manner answering phone calls, if one do not have time to talk one can say that you are busy.