mình nên xưng hô thế nào cho đúng?

settling pronouns

Typed without accents: minh nen xung ho the nao cho dung?

Meaning

Highlighted words are what Saigon and Hà Nội say differently.

settling pronouns
interjection

how should we address each other?

The question that settles pronouns. Vietnamese people take it as thoughtful, not odd, and it usually leads to comparing ages.
- Saigon
  Xin lỗi, mình nên xưng hô thế nào cho đúng vậy?
  
  Hà Nội
  Xin lỗi, mình nên xưng hô thế nào cho đúng nhỉ?
  
  Sorry, how should we address each other?
- Mình nên xưng hô thế nào cho đúng? Bạn sinh năm mấy?
  How should we address each other? What year were you born?