1 Introduction

2 Background  
2.1 Types of Dialogues  
2.2 Task Definition  

3 The Independent Development of TOD & ODD  
3.1 The Development of TOD  
3.2 The Development of ODD  

4 Fusion between LLM and DM  
4.1 Fusion within TOD  
4.2 Fusion between TOD and ODD  
4.3 Fusion between LLM and DM  

5 LLM-based Dialogue System  
5.1 Internal Reasoning  
5.2 External Sources  

6 Discussions  
6.1 Multi-modality  
6.2 Hallucination  
6.3 Safety  

7 Conclusion