Reset Dropdown to Blank using Jquery

My form has two drop-downs to select who gets the email. Both are hidden until a radio selection is chosen. I need to reset the drop-down selection of the other drop-down when the radio selection changes to avoid sending to two people.

The only place I could see changing after a selections was made was inside
#select2-chosen-1 so I tried resetting that with:

jQuery("#select2-chosen-1").text('---');

but that only “appears” to reset it when I send the form two selections are still being processed.

Here’s what I’m using so far.

jQuery('input[type=radio][name=radio-email-location]').change(function() {
        if (this.value == 'San Jose') {
            //alert("San Jose Selected");
			 jQuery('#email-san-jose-wrap').css('display','initial');
			 jQuery('#email-san-fran-wrap').css('display','none');
			 jQuery("#select2-chosen-2").text('---');
        }
        else if (this.value == 'San Francisco') {
            //alert("San Francisco Selected");
			jQuery('#email-san-jose-wrap').css('display','none');
			jQuery('#email-san-fran-wrap').css('display','initial');
			jQuery("#select2-chosen-1").text('---');
        }

    });

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