How to make a notification on submit in this situation?

Question

Ruby on Rails

Good day.
I have a Ruby on Rails project and I have an html form that works as expected.
The form looks like this:

<form action="...ru/api/submit_ticket" enctype="multipart/form-data" method="post">
</form>

But I need to make sure that after sending the data, a notification appears about the successful sending of the data.
Something like this:

redirect_to support_path, notice: 'Ваше письмо успешно отправлено!

Please tell me how to be in such a situation. I think I just need a RoR form with an absolute link in the action