Hi Domas,
Welcome to the forums!
You’re writing a paper a Dialog Support System? What exactly do you mean? The problem is, that there are some many synonym of the words. I’d like to suggest to search for conversational agent, virtual agent, chatbot, chat bot, virtual assistant.
Or do you mean a system that a human conversating with another human can use, i.e. a system that add to a conversation?
offtopic: would it be possible to add a bio and a photo to your profile? That makes it a little bit more personal, and provides context for your enquiries.
Erwin