# Using assisted slot resolution to clarify slot values in Amazon Lex V2
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**Note**  
Before you can take advantage of the generative AI features, you must fulfill the following prerequisites  
For information about pricing for using Amazon Bedrock, see [Amazon Bedrock pricing](https://aws.amazon.com/bedrock/pricing/).
Turn on the generative AI capabilities for your bot locale. To do so, follow the steps at [Optimize Lex V2 bot creation and performance by using generative AI](generative-features.md). 

You can improve the accuracy of some built-in slots in your bot's conversation flow by using assisted slot resolution. Assisted slot resolution uses Amazon Bedrock large language models (LLMs) to improve recognition of some built-in slots, which results in an improved interpretation of customer responses during slot elicitation. For utterances that could not be resolved normally, Amazon Lex V2 will attempt to resolve them a second time using Amazon Bedrock.

Assisted slot resolution allows you to use the power of Amazon Bedrock foundation models to improve the accuracy of the following built-in slots:
+ `AMAZON.Alphanumeric` without regex support
+ `AMAZON.City`
+ `AMAZON.Country`
+ `AMAZON.Date`
+ `AMAZON.Number `
+ `AMAZON.PhoneNumber`
+ `AMAZON.Confirmation`

You can enable assisted slot resolution for any intent that uses the above listed built-in slots. Assisted slot resolution does not apply to custom slots or Amazon built-in slots not listed above.

You can gather data on the accuracy improvements after you enable assisted slot resolution in your Amazon Lex V2 bot by using conversation logs and metrics.
+ Conversation logs - Interpretations will have the `interpretationSource` as `Bedrock`, if Amazon Bedrock was used to resolve the slot.
+ CloudWatch metrics - Metrics will be published under the dimentions listed in CloudWatch metric. To learn more, see [Monitoring Amazon Lex with Amazon CloudWatch](https://docs.aws.amazon.com/lex/latest/dg/monitoring-aws-lex-cloudwatch.html).

To use the descriptive bot builder, ensure that your IAM role has the proper permissions by following the steps at [Permissions needed in Lex V2 for assisted slot resolution](assisted-slot-permissions.md).

**Topics**
+ [Examples of assisted slot resolution used in Lex V2](assisted-slot-examples.md)
+ [Enable assisted slot resolution in the Generative AI configuration screen](assisted-slot-genai.md)
+ [Enable assisted slot resolution in the slot settings in Lex V2](assisted-slot-level.md)
+ [Permissions needed in Lex V2 for assisted slot resolution](assisted-slot-permissions.md)