Here are a few options:
Formal:
* Ke kali nei au me ka ʻoluʻolu e hālāwai me ʻoe. (I'm waiting with pleasure to meet with you.)
* He hauʻoli nui wau e hālāwai me ʻoe. (I'm very happy to meet you.)
Informal:
* Auē, e hoʻomanawanui au e hālāwai me ʻoe. (Oh, I'm really looking forward to meeting you.)
* Eia kaʻu manaʻo, e hālāwai ana me ʻoe. (I'm thinking about meeting you.)
To make it even more personal, you could add:
* Maikaʻi loa ka lā. (Great day.)
* Aia ka manaʻo maikaʻi. (Feeling good.)
Remember, the best way to express yourself in Hawaiian is to use the language that feels most natural and authentic to you.