You will want to
create a new "Document" in the documents section in Lyrebird. Here you can enter information about the type of document, who it's to, etc.
After this you will be able to upload up to 5 fully written examples of this type of letter you're looking to dictate into with your ideal/perfect formatting.
Lyrebird will scan through these and learn your exact structure, after this is done this specific document will appear as a fourth option when you dictate. Your dictation will then be automatically formatted into this structure every time, regardless of the order in which you speak it.