Looks like we can congratulate you as the question itself suggests that you have few mosquitoes in your room! You can of course try and catch it with bare hands, but your attempts will likely fail as these blood-sucking insects move too fast. Using the UV mosquito trap which will attract a mosquito and electrocute it instantly will be the most effective one. Leave it on as frequently as possible and no one will dare disturb your peace with some ugly squeaking. You’ll find the best UV traps here.