I have a use case to capture Complaint/Request from user. How can i define an entity for handling these slots(subject of request, description of request). Here I cant use regex because these two slots can be any text, How can i define and capture the request.
If you want to capture a complaint or request, you need to design if it is allowed anytime or only after prompting the user.
If you know that the input is a complaint or request, I would recommend taking the full input and store or handle it as complaint text. Watson Assistant allows access to the entire input text. It also provides location information for detected entities. If you define certain keywords, e.g. for specific complaint categories, the entity would be detected and could serve for tagging the complaint or filing it along with categories.