Formal:
* J'espère vous rencontrer. (I hope to meet you.) - This is the most formal way to say it.
* J'espère avoir l'occasion de vous rencontrer. (I hope to have the opportunity to meet you.) - This is another formal option.
Informal:
* J'espère te rencontrer. (I hope to meet you.) - This is the informal version, used with friends or people you know well.
* J'ai hâte de te rencontrer. (I'm looking forward to meeting you.) - This is more informal and expresses excitement.
* On se voit bientôt, j'espère. (See you soon, I hope.) - This is a casual way to say it.
You can also add a bit of context, such as:
* J'espère vous rencontrer à l'occasion du prochain salon. (I hope to meet you at the next trade show.)
* J'espère vous rencontrer dans les prochains jours. (I hope to meet you in the next few days.)
The best way to choose the right phrase depends on the context and your relationship with the person you're talking to.