Grammar fix
take a message
write down a message
To write down a message for someone who is not available so they can get it later.
expressionB1common
Hear it in context
Notice where the phrase sounds natural.
She's in a meeting right now — can I take a message?
A: Is Anna there?
B: She's just stepped out — can I take a message?
Fix the pattern
One small grammar move makes it sound right.
Not: Do you want I write a message?
Say: Can I take a message?
The fixed phrase is 'take a message' (the listener takes it); the caller 'leaves a message'.