contact.hbs

<h1>{{firstName}} {{lastName}}</h1>

<dl>
  <dt>Email</dt>
  <dd>{{email}}</dd>

  <dt>Title</dt>
  <dd>{{title}}</dd>
</dl>

<p>
  Updated at: {{formatted-date updatedAt 'MMMM Do, YYYY [at] h:mm a'}}
  <br>
  Created at: {{formatted-date createdAt 'MMMM Do, YYYY [at] h:mm a'}}
</p>

<button class="btn" {{action 'showAlert' model}}>Alert</button>

contact.js

import Ember from 'ember';

export default Ember.Controller.extend({
  actions: {
    showAlert: function(contact) {
      alert('Hello ' + contact.get('firstName'));
    }
  }
});