May I give you a little advise. You will be a tourist. Hopefully fluent in French, and if not I would not suggest a reading there. There are countless of great readers, but as a tourist, who may have a language barrier, this would not work to your favour.
I have been a reader for a very long time, and I am very international However, when I have someone who comes, and needs someone there to interpret the session, it is twice the work, and seldom does the flow work well. True, in their being they are usually please with my service (usually they do return), but as a reader, I will admit that because it does not flow as easy, I am subconsciously perhaps more willing to close up the session a little sooner than normal. That means something does get lost in the session.
Now should language not be the issue, also know that you are a tourist, and many readers, (this I do not do) will be of a mind set that they will not see you again, so bs could get into the mix.
Wise to have a reading local, especially since you are seeking a reader, instead of knowing of someone you wish to see. Someone I would highly recommend in Paris is Lynn Bell, who is an American who lives in Paris. She is an excellent astrologer. Sorry, don't know tarot readers there.