It's not necessary to use honorific language.
Formality isn't necessary.
Don't be so formal, bro/sis.
When you meet that famous person, remember that you have to be formally polite, child.
Let's not speak so formally with each other.
No need to speak so formally.
Don't use honorific language.
If I may ask, where is your spouse? Is he/she at home now?
May I ask what tribe you belong to?