Well any coolant CAN be very dangerous (though, not always). First you need to figure out by yourself or your mechanic needs to check from where it is leaking? If its leaking hose its very easy, quick and low cost job to fix it by changing the leaking hose. If its coolant bottle itself is leaking then also its quick, easy and slightly moderate cost job to change the bottle. If coolant is leaking from radiator, then you are stuck with big and expensive fix to dismantle the whole radiator and get it changed (quite expensive). For car older than 5 years there is high chances that radiator might give up, but if your car is less than 5 years and under 100k kms driven then it could be some hose or coolant bottle must be leaking.
When i know the job, i go to any random mechanic (not expensive showbiz garage) and get that done in Al quoz, Rashidiya or if job is long enough then i prefer sharjah industrial area shops for lower labor cost. Choice is yours.
Tell me, which year model your car is and how many kms is it driven? Where have you been maintaining your car periodic services? Can you figure out from where exactly is leaking? If yes then take pictures and post here may be i can help you further.