Large language models (LLMs) are able to perform sophisticated free-form reasoning tasks, including in the legal domain. Here, we introduce a framework (Dallma) for semi-structured reasoning and drafting with LLMs. The framework allows legal experts to create LLM-assisted tools for various use-cases, such as as filling in legal forms, providing legal information or even performing legal reasoning and argumentation. These tools are able to combine structured representations with large language models, seamlessly merging content and logical rules embedded in a template with information provided at runtime by a user or LLMs. We believe that this framework has important implications for e.g. access to justice.