diff --git a/hotel_calendar/static/src/js/views/calendar/hotel_calendar_controller.js b/hotel_calendar/static/src/js/views/calendar/hotel_calendar_controller.js
index b3ab3cb77..b6d7564ab 100644
--- a/hotel_calendar/static/src/js/views/calendar/hotel_calendar_controller.js
+++ b/hotel_calendar/static/src/js/views/calendar/hotel_calendar_controller.js
@@ -388,7 +388,25 @@ var PMSCalendarController = AbstractController.extend({
           }
         });
         this._multi_calendar.on_calendar('hcalOnSplitReservation', function(ev){
-          self.model.split_reservation(ev.detail.obj_id, ev.detail.nights);
+          var qdict = {};
+          var dialog = new Dialog(self, {
+            title: _t("Confirm Split Reservation"),
+            buttons: [
+                {
+                  text: _t("Yes, split it"),
+                  classes: 'btn-primary',
+                  close: true,
+                  click: function () {
+                    self.model.split_reservation(ev.detail.obj_id, ev.detail.nights);
+                  }
+                },
+                {
+                  text: _t("No"),
+                  close: true
+                }
+            ],
+            $content: QWeb.render('HotelCalendar.ConfirmSplitOperation', qdict)
+          }).open();
         });
         this._multi_calendar.on_calendar('hcalOnClickReservation', function(ev){
           //var res_id = ev.detail.reservationObj.getUserData('folio_id');
@@ -401,7 +419,25 @@ var PMSCalendarController = AbstractController.extend({
           });
         });
         this._multi_calendar.on_calendar('hcalOnUnifyReservations', function(ev){
-          self.model.unify_reservations(_.map(ev.detail.toUnify, 'id'));
+          var qdict = {};
+          var dialog = new Dialog(self, {
+            title: _t("Confirm Unify Reservations"),
+            buttons: [
+                {
+                  text: _t("Yes, unify it"),
+                  classes: 'btn-primary',
+                  close: true,
+                  click: function () {
+                    self.model.unify_reservations(_.map(ev.detail.toUnify, 'id'));
+                  }
+                },
+                {
+                  text: _t("No"),
+                  close: true
+                }
+            ],
+            $content: QWeb.render('HotelCalendar.ConfirmUnifyOperation', qdict)
+          }).open();
         });
         this._multi_calendar.on_calendar('hcalOnSwapReservations', function(ev){
           var qdict = {};
diff --git a/hotel_calendar/static/src/lib/hcalendar/js/hcalendar.js b/hotel_calendar/static/src/lib/hcalendar/js/hcalendar.js
index 624a4f840..f6937f8fe 100644
--- a/hotel_calendar/static/src/lib/hcalendar/js/hcalendar.js
+++ b/hotel_calendar/static/src/lib/hcalendar/js/hcalendar.js
@@ -180,6 +180,9 @@ HotelCalendar.prototype = {
         for (var reserv of this._reservations) {
           reserv._html.classList.add('hcal-reservation-to-divide');
         }
+      } else if (this._selectionMode === HotelCalendar.ACTION.UNIFY) {
+        this.reservationAction.action = HotelCalendar.ACTION.UNIFY;
+        this.reservationAction.toUnify = [];
       } else {
         for (var reserv of this._reservations) {
           reserv._html.classList.remove('hcal-reservation-to-divide');
@@ -189,13 +192,9 @@ HotelCalendar.prototype = {
           this._divideDivs[1].remove();
           this._divideDivs = false;
         }
-        this._reset_action_reservation();
-      }
 
-      if (this._selectionMode === HotelCalendar.ACTION.UNIFY) {
-        this.reservationAction.action = HotelCalendar.ACTION.UNIFY;
-        this.reservationAction.toUnify = [];
-      } else {
+
+        this._dispatchUnifyReservations();
         this._reset_action_reservation();
         this._updateHighlightUnifyReservations();
       }
@@ -1894,7 +1893,7 @@ HotelCalendar.prototype = {
   },
 
   _dispatchUnifyReservations: function() {
-    if (this.reservationAction.toUnify.length > 0) {
+    if (this.reservationAction.hasOwnProperty('toUnify') && this.reservationAction.toUnify.length > 1) {
       this._dispatchEvent(
         'hcalOnUnifyReservations',
         {
diff --git a/hotel_calendar/static/src/xml/hotel_calendar_templates.xml b/hotel_calendar/static/src/xml/hotel_calendar_templates.xml
index 149e8d92a..3a25797bf 100644
--- a/hotel_calendar/static/src/xml/hotel_calendar_templates.xml
+++ b/hotel_calendar/static/src/xml/hotel_calendar_templates.xml
@@ -68,6 +68,22 @@
 	</div>
 </t>
 
+<t t-name="HotelCalendar.ConfirmSplitOperation">
+	<div class="content">
+		<p>The following changes will be made...</p>
+		<span><strong>Split Reservation</strong></span><br/>
+		<p>Are you sure you want to make this changes?</p>
+	</div>
+</t>
+
+<t t-name="HotelCalendar.ConfirmUnifyOperation">
+	<div class="content">
+		<p>The following changes will be made...</p>
+		<span><strong>Unify Reservations</strong></span><br/>
+		<p>Are you sure you want to make this changes?</p>
+	</div>
+</t>
+
 
 <t t-name="HotelCalendar.TooltipReservation.Channel.ota">
 	<p>WuBook: 1544109684</p>