You are preparing for you part in a play or an audition, and there is no one who can help you by reading you the lines.
An app that reads the lines to you aloud, waits for you to say your lines, then continues reading lines to you until you stop the process or the end of the text is reached. If it’s a known text then you just have to choose who you are playing in the scene. If not, you can take a photo of the text, the app will do some OCR and let you choose your part. The app can also have an animated head articulating the words it’s reading to you.