Show Confirmation Box Before Deleting Item from MultiLookup

Hi,

In Contact Object, there is a multiselect field 'Affiliation' where I add any no of item from list.

Source Code:

Query: Whenever user click on 'x' icon to delete an item from multiselect field, Creatio should pop up a confirmation box i.e. 'Do you want to remove Item' & then delete item if user agree.