import Tkinter as tk   
from Tkinter import *
import tkMessageBox  as mb

title = itsm.getParameter("title")
message = itsm.getParameter("message")

root=tk.Tk()
root.geometry("700x100")
root.title(title)
root.eval('tk::PlaceWindow . center')
l1=Label(text=message,font=("Arial", 14))
l1.pack()

def callyes():
    root.destroy()
    print("user clicked the Okay button")

def on_closing():
    root.destroy()
    print("user closed the Reminder Window")
    
b1=Button(root,text="Okay",command=callyes,height = 1, width = 10, highlightbackground='#3E4149')
b1.pack(pady=15)
root.lift()
root.attributes('-topmost',True)
root.after_idle(root.attributes,'-topmost',False)
root.protocol("WM_DELETE_WINDOW", on_closing)
root.mainloop()