woocommerce persons plus minus

"number of persons" form field has dynamic created IDs. The field QTY input type="number" 

I've added buttons and some jquery, however, because I have multiple "person_types" fields, the plus / minus onclick is affecting all the fields
How to target the individual fields using something like a foreach - but within the jquery?

current code in functions file

    // get IDs from dynamic person_type field
			$("input[id^='wc_bookings_field_persons_']").each(function() {
  				var id = parseInt(this.id.replace("wc_bookings_field_persons_", ""), 10);
  				var qty = $("#wc_bookings_field_persons_" + id);
  				
				// target the form
				$('form.cart').on( 'click', 'button.plus, button.minus', function() {
				
				  // Get current quantity values
				  var qty = $( this ).closest( 'form.cart' ).find( "#wc_bookings_field_persons_" + id);
                   // also tried this 
                    // var qty = $( this ).closest( 'form.cart' ).find( "#wc_bookings_field_persons_" + id + ".qty");

				  var val   = parseFloat(qty.val());
				  var max = parseFloat(qty.attr( 'max' ));
				  var min = parseFloat(qty.attr( 'min' ));
				  var step = parseFloat(qty.attr( 'step' ));
	   
				  // Change the value if plus or minus
				  if ( $( this ).is( '.plus' ) ) {
					 if ( max && ( max <= val ) ) {
						qty.val( max );
					 } 
				  else {
					 qty.val( val + step );
					   }
				  } 
				  else {
					 if ( min && ( min >= val ) ) {
						qty.val( min );
					 } 
					 else if ( val > 1 ) {
						qty.val( val - step );
					 }
				  }	
			
			});

       });


and the html in the numbers.php bookings template file (basically just adding buttons) 


        <p class="form-field form-field-wide <?php echo esc_attr( implode( ' ', $class ) ); ?>">
         <label for="<?php echo esc_attr( $name ); ?>"><?php echo esc_html( $label ); ?>:</label>

       <button type="button" class="minus" >-</button>

       <input class="qty" 
     type="number"
     value="<?php echo ( ! empty( $min ) ) ? esc_attr( $min ) : 0; ?>"
     step="<?php echo ( isset( $step ) ) ? esc_attr( $step ) : ''; ?>"
     min="<?php echo ( isset( $min ) ) ? esc_attr( $min ) : ''; ?>"
     max="<?php echo ( isset( $max ) ) ? esc_attr( $max ) : ''; ?>"
     name="<?php echo esc_attr( $name ); ?>"
     id="<?php echo esc_attr( $name ); ?>"
    /> 
    
         <button type="button" class="plus" >+</button>
	
	   <?php echo ( ! empty( $after ) ) ? esc_html( $after ) : ''; ?>
    
       </p>