Ruby on Rails: Search collection_check_boxes on a form

In my RoR application I have functionality that allows a user to select contacts to send an email to. I want to add to this functionality so that a user can search the contacts.

Currently, the contacts are displayed on the views/emails/form.html.erb in checkboxes that the user can select through:

<%= f.collection_check_boxes :contact_ids, Contact.where(user_id: session[:user_id]), :id, :firstname %>

Is it possible to build on this by adding a search bar above the checkboxes that allows the user to search the checkboxes by first name?