If someone wishes to see the Prophet (Sallal lahu alaihi wasallam) in his dream, he should recite this Aayat 7 times before going to sleep. InshaAllah, his wish will be fulfilled.
اِنَّ اللّٰهَ وَمَلٰٓٮِٕكَتَهٗ يُصَلُّوۡنَ عَلَى النَّبِىِّ ؕ يٰۤـاَيُّهَا الَّذِيۡنَ اٰمَنُوۡا صَلُّوۡا عَلَيۡهِ وَسَلِّمُوۡا تَسۡلِيۡمًا