Show specific values when dropdown is select

At the risk of this question being closed for being too broad, there are a couple ways to handle this.

Unlike other CMS such as WordPress, in Craft CMS, the front end code is up to you. If you don't have any experience with HTML or CSS, you're going to need to get that experience first.

Assuming you have front end development experience, I'd recommend the Introduction to Templating page inside the Craft CMS documentation. Twig is a different, but great templating language for PHP.

In general, the way I work, I usually build the HTML and CSS outside of Craft first. When I have a good base, then I bring in the CMS related elements where you need them.

From your example, I can't tell if that's a mockup or production code but it looks like you're going to be making use of some sort of "accordion" UI component.

You could use something like one of the premade Foundation or Bootstrap components or if your project already has something like that built in, check out how it's built already by visiting the templates folder inside your project.

From there, if those booking links aren't being stored in Craft at all, you could just hardcode them in. But I'm also guessing those links could change at some point so maybe you use a Globals field to store them.

With knowing more it's hard to recommend a path but hopefully that gets you going.