Fix: requested Changes
diff --git a/erpnext/hr/doctype/shift_assignment/shift_assignment.py b/erpnext/hr/doctype/shift_assignment/shift_assignment.py
index f5bd0d0..20553b9 100644
--- a/erpnext/hr/doctype/shift_assignment/shift_assignment.py
+++ b/erpnext/hr/doctype/shift_assignment/shift_assignment.py
@@ -60,15 +60,17 @@
 	def throw_overlap_error(self, shift_details):
 		shift_details = frappe._dict(shift_details)
 		if shift_details.docstatus == 0:
-			msg = _("Employee {0} has already applied for {1}: {2}").format(self.employee, self.shift_type, shift_details.name)
+			msg = _("Employee {0} has already applied for {1}: {2}").format(frappe.bold(self.employee), frappe.bold(self.shift_type), frappe.bold(shift_details.name))
 		if shift_details.docstatus == 1 and shift_details.status == "Active":
-			msg = _("Employee {0} already has Active Shift {1}: {2}").format(self.employee, self.shift_type, shift_details.name)
+			msg = _("Employee {0} already has Active Shift {1}: {2}").format(frappe.bold(self.employee), frappe.bold(self.shift_type), frappe.bold(shift_details.name))
 		if shift_details.start_date:
 			msg += _(" from {0}").format(getdate(self.start_date).strftime("%d-%m-%Y"))
+			title = "Ongoing Shift"
 			if shift_details.end_date:
 				msg += _(" to {0}").format(getdate(self.end_date).strftime("%d-%m-%Y"))
+				title = "Active Shift"
 		if msg:
-			frappe.throw(msg)
+			frappe.throw(msg, title=title)
 
 @frappe.whitelist()
 def get_events(start, end, filters=None):
diff --git a/erpnext/hr/doctype/shift_request/shift_request.json b/erpnext/hr/doctype/shift_request/shift_request.json
index fee55dd..64cbdff 100644
--- a/erpnext/hr/doctype/shift_request/shift_request.json
+++ b/erpnext/hr/doctype/shift_request/shift_request.json
@@ -26,9 +26,7 @@
    "in_list_view": 1,
    "label": "Shift Type",
    "options": "Shift Type",
-   "reqd": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "reqd": 1
   },
   {
    "fieldname": "employee",
@@ -36,18 +34,14 @@
    "in_list_view": 1,
    "label": "Employee",
    "options": "Employee",
-   "reqd": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "reqd": 1
   },
   {
    "fetch_from": "employee.employee_name",
    "fieldname": "employee_name",
    "fieldtype": "Data",
    "label": "Employee Name",
-   "read_only": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "read_only": 1
   },
   {
    "fetch_from": "employee.department",
@@ -55,15 +49,11 @@
    "fieldtype": "Link",
    "label": "Department",
    "options": "Department",
-   "read_only": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "read_only": 1
   },
   {
    "fieldname": "column_break_4",
-   "fieldtype": "Column Break",
-   "show_days": 1,
-   "show_seconds": 1
+   "fieldtype": "Column Break"
   },
   {
    "fieldname": "company",
@@ -71,24 +61,18 @@
    "in_list_view": 1,
    "label": "Company",
    "options": "Company",
-   "reqd": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "reqd": 1
   },
   {
    "fieldname": "from_date",
    "fieldtype": "Date",
    "label": "From Date",
-   "reqd": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "reqd": 1
   },
   {
    "fieldname": "to_date",
    "fieldtype": "Date",
-   "label": "To Date",
-   "show_days": 1,
-   "show_seconds": 1
+   "label": "To Date"
   },
   {
    "fieldname": "amended_from",
@@ -97,9 +81,7 @@
    "no_copy": 1,
    "options": "Shift Request",
    "print_hide": 1,
-   "read_only": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "read_only": 1
   },
   {
    "default": "Draft",
@@ -107,23 +89,21 @@
    "fieldtype": "Select",
    "label": "Status",
    "options": "Draft\nApproved\nRejected",
-   "reqd": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "reqd": 1
   },
   {
+   "fetch_from": "employee.shift_request_approver",
+   "fetch_if_empty": 1,
    "fieldname": "approver",
    "fieldtype": "Link",
    "label": "Approver",
    "options": "User",
-   "reqd": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "reqd": 1
   }
  ],
  "is_submittable": 1,
  "links": [],
- "modified": "2020-06-23 15:56:44.536207",
+ "modified": "2020-08-10 17:59:31.550558",
  "modified_by": "Administrator",
  "module": "HR",
  "name": "Shift Request",
diff --git a/erpnext/hr/doctype/shift_request/shift_request.py b/erpnext/hr/doctype/shift_request/shift_request.py
index 8a2e7ed..1c2801b 100644
--- a/erpnext/hr/doctype/shift_request/shift_request.py
+++ b/erpnext/hr/doctype/shift_request/shift_request.py
@@ -32,6 +32,8 @@
 			assignment_doc.insert()
 			assignment_doc.submit()
 
+			frappe.msgprint(_("Shift Assignment: {0} created for Employee: {1}").format(frappe.bold(assignment_doc.name), frappe.bold(self.employee)))
+
 	def on_cancel(self):
 		shift_assignment_list = frappe.get_list("Shift Assignment", {'employee': self.employee, 'shift_request': self.name})
 		if shift_assignment_list:
diff --git a/erpnext/hr/doctype/shift_type/shift_type.py b/erpnext/hr/doctype/shift_type/shift_type.py
index dfe094e..dd08d31 100644
--- a/erpnext/hr/doctype/shift_type/shift_type.py
+++ b/erpnext/hr/doctype/shift_type/shift_type.py
@@ -78,10 +78,9 @@
 			if shift_details and shift_details.shift_type.name == self.name:
 				mark_attendance(employee, date, 'Absent', self.name)
 
-	def get_assigned_employee(self, from_date=None, consider_default_shift=False):
-		filters = {'start_date':('>=', from_date), 'shift_type': self.name, 'docstatus': '1'}
-		if not from_date:
-			del filters['date']
+	def get_assigned_employee(self, consider_default_shift=False):
+		filters = {'shift_type': self.name, 'docstatus': '1'}
+
 		assigned_employees = frappe.get_all('Shift Assignment', 'employee', filters, as_list=True)
 		assigned_employees = [x[0] for x in assigned_employees]