Hi Babitha,
Hope you are fine. I am doing well. I feel delighted to let you know that I am finally travelling to Australia on my PR visa on the 19th of May.
It was an immense effort from your side that I got my PR visa so smoothly. You worked with me since January 2013 and I would like to greatly appreciate your professionalism, zeal and expertise as my Process Consultant. You and your team really exceeded all my expectations and I wish you all the best for your career ahead.
Feel free to forward this email in your hierarchy, if you may need it for a professional growth.
Thanks and best regards,
Anirban