If you've been successful with the introduction and body of your presentation,your listeners now have the information they need,and the close can become casual and minimal.

Casual

Describing an informal, relaxed approach or style, often used in reference to dress code or communication tone.

Introduction

The initial section of a document, presentation, or discussion that sets the context and outlines the main themes or objectives.

Body of Presentation

The main part of a presentation that includes the key points, arguments, and evidence to support the speaker's purpose.