What is the proper way to autopopulate assigned user for lead conversion to the current user that is converting?

Sugar OnDemand 9.1.0 Professional

As the title says, I would like the assigned user to change to the user that is converting the lead. Our leads are assigned to a group user of 'Sales', but when a user converts a lead to an opportunity, i want to reduce the amount of fields that will need interaction thus having the assigned user field update with the current user. Any advice?