works for me

• sounds goodCasual expression of agreement
• okayAdequate or permitted
• agreedShared the same view
• thumbs upGesture signaling approval
• no problemCasual acceptance or dismissal

all set · deal · I'm in · sure thing · good to go · perfect · acceptable · satisfactory · convenient · doable · manageable · flexible · easygoing · compromise · nod · shrug · green light · approval

• affirmativesyes, yeah, yep, yup, absolutely
• agreementagree, accord, yes, yeah, yep
• informal approvalokay, cool, nice, great, awesome