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Tools used: Python, tensorflow, tflearn Tasks : Created a chatbot framework and build a conversational model for an hypothetical meeting assistant Approach: To classify a sentence and match with intent based on category and then extract entities out of it for subsequent action Concept: Train all the sentences of each category based on their categories using tensorflow Then classify the new sentence into one of the category based on the percentage match or probability One can check the probabilites using function example : classify("Schedule a meeting with John") Outcome format [(u'schedule-meeting', 0.87971735)] Model: Used tensorflow which follows Deep neural network framework for text classification. I used internet resources for the text classification model. Each conversational intent contains: a tag (a unique name) patterns (sentence patterns for our neural network text classifier) We create a list of documents (sentences), each sentence is a list of stemmed words and each document is associated with an intent (a class). 49 documents =>49 sentences 5 classes => 5 intents 72 unique stemmed words Categories (labels or tags or classes) : retrieve-email retrieve-document make-call schedule-meeting add-action-item Choosing tensorflow over any other readily avialable tools like API.AI is because tensorflow gives flexibility to the conversation. Issues faced: Tough to find a library which extracts time from sentence Running the code. Files used : 1) main.py 2) preprocessing.py 3) entities.py 4) intents.json run main.py file by changing the text inside main() function for appropriate bot response. In case of names start with capital letters eg : John Conclusion : I have gone wwith tensorflow for training the sentences
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A very basic intent and entity classifier for chat assistant
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