Fulfillment
After all the slot values are provided by the user for the intent, Amazon Lex V2 fulfills the user’s request. You can configure the following options for fulfillment.
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Fulfillment code hook – You can use this option to control the fulfillment Lambda invocation. If the option is disabled, the fulfillment succeeds without invoking the Lambda function.
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Fulfillment updates – You can enable fulfillment updates for Lambda functions that take more than a few seconds to complete, so that the user knows that the process is in progress. For more information, see Configuring fulfillment progress updates for your Lex V2 bot. This functionality is only available for streaming conversations.
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Fulfillment responses – You can configure a success response, a failure response, and a timeout response. The appropriate response is returned to the user based on the status of the fulfillment Lambda invocation.
There are three possible fulfillment responses:
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Success response – A message sent when the fulfillment Lambda completes successfully.
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Failure response – A message sent if the fulfillment failed or Lambda can't be completed for some reason.
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Timeout response – A message sent if the fulfillment Lambda function doesn't finish within the configured timeout.
You can set values, configure the next steps, and apply conditions corresponding to each response to design the conversation flow. In the absence of a condition or an explicit next step, Amazon Lex V2 moves to closing response.
Note
On August 17, 2022, Amazon Lex V2 released a change to the way conversations are managed with the user. This change gives you more control over the path that the user takes through the conversation. For more information, see Changes to conversation flows in Amazon Lex V2. Bots created before August 17, 2022 do not support dialog code hook messages, setting values, configuring next steps, and adding conditions.
