Lex chatbot response for Polly speech file

Question

I am experiencing this output on the Amazon Lex Chat interface for Polly audio speech. ``` Invalid Lambda Response: Received invalid response from Lambda: Cannot construct instance of `IntentResponse`, problem: Intent must not be null when DialogActionType is Close at [Source: (String)"{"sessionState": {"dialogAction": {"type": "Close", "fulfillmentState": "Fulfilled", "response": {"contentType": "SSML", "content": "

"}}}, 'messages': [], 'requestAttributes': {}} ``` I am not sure how this lambda_handler response is to be formatted as this looks correct in the response, any quick help is appreciated. Polly mp3 are generated correctly in the S3 bucket and I can listen to them seperately. My code snippet for lambda_handler is as below: ``` *# Prepare the response for Lex V2 lex_response = { "sessionState": { "dialogAction": { "type": "Close", "fulfillmentState": "Fulfilled", "response": { "contentType": "SSML", "content": f"

" } } }, "messages": [], "requestAttributes": {} } print('lex_response is', lex_response) return lex_response* ```

Answer

**The one that I got working for me (up to some extent of the format that I expected) is this one:** ``` lex_response = { "messages": [ { "contentType": "SSML", "content": f"

", "type": "unstructured" }, { "contentType": "PlainText", "content": response["answer"], "type": "unstructured" } ], "sessionState": { "dialogAction": { "type": "ElicitIntent" } } } ```

Answer

Hello

The above error occurs when “intent” has not been specified for closing in the session state. When we specify the type option as “Close”, it ends the specified intent fulfillment process. To close, we need to specify the intent in the lambda response that needs to be closed. Please add the intent in the session state using the syntax in https://docs.aws.amazon.com/lexv2/latest/dg/lambda-common-structures.html#lambda-intent .

Answer

Hi Divya003, I am getting the same error after adding the intent: lex_response = { "sessionState": { "dialogAction": { "type": "Close", "fulfillmentState": "Fulfilled", "intent": { "name": "FallbackIntent" }, "message": { "contentType": "SSML", "content": f"

" } } } }

Lex chatbot response for Polly speech file

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