This article explains how to make Alexa say what you want. The instructions apply to all Alexa devices, including the Amazon Echo Show.
How to Make Alexa Say Anything You Want!
The easiest way to get Alexa to say something is to use the built-in Simon Says skill. Simply say, “Alexa, Simon says,” followed by a phrase. Alexa will repeat what you say word for word. For example:
Instead of answering the question, it will just ask, “How many planets are in our solar system?” You can also add Alexa skills, like Text to Voice, which lets you type phrases for Alexa to repeat in a web browser.
To set up the Alexa Text to Voice skill, follow these steps: