Amazon Lex (C): This service is crucial for building conversational interfaces. It provides the capabilities to understand and interpret user input in natural language, which is essential for understanding the questions asked by executives.
Amazon Transcribe (F): For a spoken interface, you need a service that can convert speech into text. Amazon Transcribe does exactly this, allowing the system to process spoken questions by converting them into text that can then be interpreted by Amazon Lex.
Amazon Polly (D): To enhance the user experience by responding to inquiries not only in text but also in spoken form, Amazon Polly is ideal. It converts text responses into lifelike speech, allowing the system to verbally communicate with the executives.
Together, these three services (Amazon Lex, Amazon Transcribe, and Amazon Polly) will enable a comprehensive conversational interface for the BI application, catering to both written and spoken queries and responses