Fix FormatNotSupportedError

✅ Solution

The "FormatNotSupportedError" in autogen often arises when a function like `oai.Completion.create` receives a `format` parameter (e.g., for specifying response type) that it doesn't recognize or support. To fix this, either remove the `format` parameter if it's unnecessary, or change it to a supported format like "json" if the model and function support structured responses. Ensure the specified format is aligned with the capabilities of the underlying language model and the API endpoint being used.