Jessica S. answered 03/28/19
English Tutor Specializing in Writing and Proofreading/Editing.
Depending upon your level of familiarity and therefore formality with said colleague, I would personally consider concluding the email in a slightly more professional manner which confirms said scheduled plans for you both (e.g., “I look forward to seeing you tomorrow, Friday the 29th, at noon. Sincerely, X.”).
However, depending upon your relationship with this colleague, the aforementioned statement can arguably come across as too stilted. So, I don't know if my advice is even applicable. If not, please feel free to let me know, and I'd be happy to provide some more possibilities regarding phrasing.
Have a great day!