Within the “Request a quote” page, there is a form that the user can fill out to request a quote for the list of products. The form will be sent to the shop administrator.
The email that is sent to administrator includes the list of products selected by the customer, their data and an possible message, if added in the form.
The free plugin does not provide for any auto reply system. The administrator must send the quote to the email address received with the form, there is no option to manage it from the backend (that is a premium feature).