If you have any questions, let me know but then my mind was telling me that perhaps the or your colleague bit changes the subject or something, so the sentence could be written as follows, if you Ò€¦ I am sending an e-mail to a colleague to arrange a meeting. In my e-mail i inform her where and when we can meet, and i would like to end the e-mail by saying something like see you there or see you Ò€¦

The colleague is not necessarily working at the moment the tag is shown, much rather it's just a colleague from the workplace.