Many works on dialogue systems have developed a knowledge-grounded dialogue system to incorporate knowledge into dialogue. MultiDoc2Dial is a realistic task that dialogue flow shifts relevant grounding content among different documents dynamically in ...
Many works on dialogue systems have developed a knowledge-grounded dialogue system to incorporate knowledge into dialogue. MultiDoc2Dial is a realistic task that dialogue flow shifts relevant grounding content among different documents dynamically in a conversation. In this paper, we employ a pipeline system of retriever, re-ranker, generator. We propose an improved target-side data augmentation approach that narrows the gap in the decoding procedure between train and inference. Furthermore, we propose multi-task learning, which includes grounding span and dialog act prediction, as a single sequence generation for document-grounded dialogue generation. We evaluate our methods on the validation set of MultiDoc2Dial dataset, obtaining state-of-the-art results on both seen and unseen settings.