If the user, for whatever reason, does not want to read the prompt that they are give, they should be able to skip it. This should read in a new prompt to show them and throw away any recording to not get wrong audio for text.
While not necessary for the recording functionality, it would also be nice to mark skipped prompts. This would make it possible to find prompts that may be inappropriate. Just as a boolean can be done without the user needing to do anything. An extension of this would be giving the user the ability to say why the skipped. This can be alternatives ("too hard", "inappropriate subject" etc.) or free text.