permutations and variations for chatbot user intents -

(first time posting, nice. also, i'm learning how code, may not ask question in right way, nice) i'm designing chatbot , i'm having trouble finding solution creates possible permutations , variations how user ask question or make request. example, if user wants know weather ask "wha't weather?" or "will sunny tomorrow?" or, or, or. resources point me appreciated.

this called natural language processing , not trivial. wouldn't recommend working on complex beginner. https://en.wikipedia.org/wiki/natural_language_processing

i found couple threads people wanted same thing.

any tutorials developing chatbots?

https://softwareengineering.stackexchange.com/questions/132165/programming-a-chatterbot-understanding-language

but yeah, isn't easy.