Sounding professional in English without sounding stiff
The phrases that get flagged as unprofessional are usually the vague ones, not the casual ones. What to replace them with.
In this series (2)
A better way to say "as soon as possible"
"ASAP" transfers your urgency without transferring your deadline. Say the date instead, and say what happens if it slips.
CEFR B2
A more professional way to say "I want to"
"I want to" states a preference where the room expects a proposal. Four rewrites that put the reasoning in front of the wish.
CEFR B2