  In this research, by responding to users' utterances with multiple replies to
create a group chat atmosphere, we alleviate the problem that Natural Language
Generation chatbots might reply with inappropriate content, thus causing a bad
user experience. Because according to our findings, users tend to pay attention
to appropriate replies and ignore inappropriate replies. We conducted a 2
(single reply vs. five replies) x 2 (anonymous avatar vs. anime avatar)
repeated measures experiment to compare the chatting experience in different
conditions. The result shows that users will have a better chatting experience
when receiving multiple replies at once from the NLG model compared to the
single reply. Furthermore, according to the effect size of our result, to
improve the chatting experience for NLG chatbots which is single reply and
anonymous avatar, providing five replies will have more benefits than setting
an anime avatar.
