```ruby
module ApplicationHelper
  def bootstrap_class_for flash_type
    { "success" => "alert-success", "error" => "alert-danger", "alert" => "alert-warning", "notice" => "alert-info" }[flash_type] || flash_type.to_s
  end

  def flash_messages(opts = {})
    flash.each do |msg_type, message|
      concat(content_tag(:div, message, class: "alert #{bootstrap_class_for(msg_type)} fade in") do
               concat content_tag(:button, 'x', class: "close", data: { dismiss: 'alert' })
               concat message
             end)
    end
    nil
  end
end
```

Change notice flash to success.
user
```ruby
module ApplicationHelper
  def bootstrap_class_for flash_type
    { "success" => "alert-success", "error" => "alert-danger", "alert" => "alert-warning", "notice" => "alert-success" }[flash_type] || flash_type.to_s
  end

  def flash_messages(opts = {})
    flash.each do |msg_type, message|
      concat(content_tag(:div, message, class: "alert #{bootstrap_class_for(msg_type)} fade in") do
               concat content_tag(:button, 'x', class: "close", data: { dismiss: 'alert' })
               concat message
             end)
    end
    nil
  end
end
```
assistant