Hi,
You may be sending the email in HTML format. You can enclose the %INFO% tag between <pre>…</pre> tags to preserve the line breaks or change the format to plain text.
You can also fully customize the email by replaced the %INFO% tag for specific tags for the info you want to include in the email:
https://apphourbooking.dwbooster.com/faq/#q81
Thank you for using the plugin!