diff --git a/app/services/quick_actions/interpret_service.rb b/app/services/quick_actions/interpret_service.rb
index 8adfd939c2e..4ceabaf021e 100644
--- a/app/services/quick_actions/interpret_service.rb
+++ b/app/services/quick_actions/interpret_service.rb
@@ -150,6 +150,24 @@ module QuickActions
       end
     end
 
+    desc do
+      "Change assignee#{'(s)' if issuable.allows_multiple_assignees?}"
+    end
+    explanation do |users|
+      users = issuable.allows_multiple_assignees? ? users : users.take(1)
+      "Change #{'assignee'.pluralize(users.size)} to #{users.map(&:to_reference).to_sentence}."
+    end
+    params do
+      issuable.allows_multiple_assignees? ? '@user1 @user2' : '@user'
+    end
+    condition do
+      issuable.persisted? &&
+        current_user.can?(:"admin_#{issuable.to_ability_name}", project)
+    end
+    command :reassign do |unassign_param|
+      @updates[:assignee_ids] = extract_users(unassign_param).map(&:id)
+    end
+
     desc 'Set milestone'
     explanation do |milestone|
       "Sets the milestone to #{milestone.to_reference}." if milestone
diff --git a/spec/services/quick_actions/interpret_service_spec.rb b/spec/services/quick_actions/interpret_service_spec.rb
index c9e63efbc14..b1997e64557 100644
--- a/spec/services/quick_actions/interpret_service_spec.rb
+++ b/spec/services/quick_actions/interpret_service_spec.rb
@@ -362,7 +362,7 @@ describe QuickActions::InterpretService, services: true do
         it 'fetches assignee and populates assignee_id if content contains /assign' do
           _, updates = service.execute(content, issue)
 
-          expect(updates).to eq(assignee_ids: [developer.id])
+          expect(updates[:assignee_ids]).to match_array([developer.id])
         end
       end
 
@@ -431,6 +431,22 @@ describe QuickActions::InterpretService, services: true do
       end
     end
 
+    context 'reassign command' do
+      let(:content) { '/reassign' }
+
+      context 'Issue' do
+        it 'reassigns user if content contains /reassign @user' do
+          user = create(:user)
+
+          issue.update(assignee_ids: [developer.id])
+
+          _, updates = service.execute("/reassign @#{user.username}", issue)
+
+          expect(updates).to eq(assignee_ids: [user.id])
+        end
+      end
+    end
+
     it_behaves_like 'milestone command' do
       let(:content) { "/milestone %#{milestone.title}" }
       let(:issuable) { issue }