Level 1: Simple acceptance (safe, clean)

Wakarimashita.
Go-setsumei arigatō gozaimasu.

👉 Translation vibe: I understand. Thank you for explaining.

Level 2: Acceptance + appreciation (very good impression)

Rikai shimashita.
O-isogashii naka, go-sōdan ni notte itadaki arigatō gozaimasu.

👉 This says: I respect your time and effort.

Level 3: Acceptance + maturity (my favorite)

Sō iu rūru na no desu ne.
Rikai shimashita.

✨ This is VERY Japanese.
It signals: I accept the system, not fighting it.

Level 4: Acceptance + future-facing (leaves door open)

Wakarimashita.
Mata hitsuyō ni nattara, go-sōdan sasete kudasai.

👉 Gentle, polite, no pressure — but the door stays unlocked.
“I understand. If it becomes necessary, please allow me to consult with you again.”