Rasa answers only for once or even no answer shown!

Hi folks, I trained my Rasa chatbot, but when I ask something from it, it shows some answers only one time, for some intents it doesn’t show anything, and for a few of them it shows the answer without problem. Does anyone have same experience before? What could be the reason? Also, the stories, the nlu file, and domain are well prepared and have no problems.

I have around 112 intents introduced in domain file, but not all of them in the nlu.yml.

Found the answer. It seems I have to define some rules just for simple questions. As much as I understood, we can not rely on stories, and rules must be defined.

For your reference: