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Charly was an conversational e-commerce experiment for enabling purchasing through messaging apps (Facebook Messenger). It employes: 
1. Method for contextual conversational dialogs: https://blogs.sap.com/2022/03/11/smoothing-context-switching-for-digital-assistants/
2. Concept search with word embeddings: https://blogs.sap.com/2022/03/11/concept-search-with-word-embeddings/
3. Catalog entity extraction for improved search: https://blogs.sap.com/2021/09/01/improve-conversational-commerce-search-with-knowledge-graphs/

Giancarlo Frison