I look forward to talking to you が良かったですね。
訂正メールは以下で如何ですか。
Dear ○○,
Please note that although I wrote that I “look forward to meeting you” I will not be visiting the US. I meant to write that I look forward to our video conference.
Best regards,
○○○
会議の日時も入れておく場合は最後の部分を例えば our video conference on Tuesday, May 8 at 9 am Japan time (xx pm New York time). に変えるといいです。