Looking on the internet deeply has found these results:

Thank you so much for the cooperation is the most popular phrase on the web.

Thank you for your kind cooperation 166,100 results on the web	Thank you so much for the cooperation 191,500 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I also want to thank you for your kind words about my business proposition. Thank you for your kind attention. Thank you for your kind treatment of us, Mr President. I wanted to thank you for your kind recommendation. Thank you for your kind words with the bank today. Thank you for your kind attention. Thank you for your kind blessings. Thank you for your kind words about my chairs, Miss Porter.	Thank you so much for letting me mooch off your manpower. Now I will finish that argumentative mood and turn to the French presidency to say: Madam Minister, thank you so much for your cooperation and the work that your staff and others have done over the months of your presidency. Thank you so much for your cooperation. Thank you so much for coming. Thank you so much for letting me mooch off your manpower. So thank you so much for calling. Even on such a short notice Thank you so much for your cooperation

Thank you for your kind cooperation

166,100 results on the web

Thank you so much for the cooperation

191,500 results on the web

More popular!

Thank you so much for letting me mooch off your manpower.
Now I will finish that argumentative mood and turn to the French presidency to say: Madam Minister, thank you so much for your cooperation and the work that your staff and others have done over the months of your presidency.
Thank you so much for your cooperation.
Thank you so much for coming.
Thank you so much for letting me mooch off your manpower.
So thank you so much for calling.
Even on such a short notice Thank you so much for your cooperation