Chatbot Development having Data Science/data analytics function

I need expert in chatbot development, with NLP, NLU. You need to have extensive experience in developing chatbot and have to finished in 2~3 day. If you have used any conversational platform I am open for suggestions. i will proivde conversation flow diagram for my project. This chatbot is going to be with multilingual support. I am open to use any open source tool from [login to view URL] Please respond with just one(just one, not a list) of similar work (and YOUR OWN WORK, DON'T PICK FROM INTERNET) sample. you should be ready to start immediately.