Formal
* Affirmative
* Certainly
* Indeed
* Very well
* Right
* Understood
* I agree
* I understand
* No problem
* I see
Informal
* Alright
* Sure
* Yep
* Yup
* Got it
* Roger that (especially in technical contexts)
* Sweet
* Cool
* Sounds good
* No worries
* Sounds great
* Fantastic
Neutral
* Fine
* Good
* All right
* Okay
* That's fine
* That works
To express enthusiasm:
* Great!
* Fantastic!
* Excellent!
* Wonderful!
* Perfect!
To express agreement:
* You got it.
* I'm with you.
* I'm on board.
* I hear you.
* Absolutely!
To express understanding:
* I see what you mean.
* I understand what you're saying.
* I follow you.
To express a neutral response:
* Uh-huh
* Mm-hmm
* Right.
To express hesitancy:
* I guess so.
* Maybe.
* I don't know.
The best way to choose the right response depends on the context, your relationship with the other person, and the tone you want to convey.