1. "Oh" means "I see" and "Um" means "I see". So, under normal circumstances, I will stop talking and say goodbye with a slight smile, "You go first", "Sorry to bother you" and "Talk to you later", elegant but not rude.
Since it is a chat, it is not a speech. The two people who are chatting are both the listeners of the other party and the two people who are talking. If only one party says "Oh", "En", "Praise" and "Applause" in the style of the other audience, then I think this audience's speech can be terminated, because you can't speak.
3. Behind "Oh" and "Well", it may be perfunctory psychology, it may be too busy to reply, or it may be that I don't want to talk anymore. In fact, it is not difficult to judge which one.
4. If it is working hours, it is better to be concise without affecting the other party's work. In this way, it is best not to feel "perfunctory" or "ignored", because the other party is probably unintentional and he is really busy.
5. If it is leisure time, is he entertaining himself or inconvenient? Still resting? I think, at this time, we can ask in a friendly way, "Will it bother you?" "If it's inconvenient for you, shall we talk about it another day?" In this way, give the other person a chance to end, and he will reply with words like "good" and "can" and end the conversation easily and happily.
6. If it is between lovers or the opposite sex, the other party replies "Oh", "Hmm" or a small expression, which doesn't necessarily mean that they don't want to talk anymore, but also distinguish the situation.
7. Maybe the other person really doesn't know what to reply, or just isn't good at replying long sentences or expressing his position quickly. Everyone's personality, habits and language ability are different. So, get to know him, don't be suspicious, and don't be sad alone. "doesn't he like me?" "Doesn't he want to talk to me?"
8. The other person may be really tired or having a rest, don't want to think, or have no interest in chatting at this time, so don't force others, don't talk at this time, and talk later.
9. The other person thought he didn't want to talk about your topic, so he replied politely. This situation is mostly because the topic itself has nothing to do with him. He thinks he doesn't need to speak or express his position, but he feels it is inappropriate to say anything. Then, we have to think to ourselves, "Is he really not interested in my topic?" Then, you might as well find a way out for yourself, "a smiling expression+if you are not interested, don't talk yet."
10. Anyway, chatting should be a pleasant process. First, there is no need to force it. Second, we should pay attention to the art of speaking, respect each other and ourselves. If you can't chat well, it's wise to stop chatting skillfully.