"Lovely to work with you and thank you for being so prompt and thorough! It is much appreciated.
I hope our paths cross in the future!"
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Thanks again for your great work. I am really enjoying working with you. "
"I have really enjoyed working with you, Bonnie. You have a very pleasant, engaging and effective way of working with people, which I have really appreciated. I hope that we can work together again on another project. "
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I look forward to working with you again soon. "