give someone a chance
US /ɡɪv ˌsʌm.wʌn ə ˈtʃæns/
UK /ɡɪv ˌsʌm.wʌn ə ˈtʃæns/

1.
to provide an opportunity for someone to do something or to prove themselves
:
•
Please give him a chance; he's really trying his best.
•
The new manager decided to give the intern a chance to lead the project.