Hi,
Five years ago I traveled as an exchange student to Italy and during my free time I worked as a receptionist in one of the best hotels over there." 'Over' just stresses the distance. You could say' over there' , 'there', or just omit the phrase entirely because it is clear without it that you are talking about Italy.
In the sentence above is it ok to write over there,or the correct is just to say:
"Five years ago I traveled as an exchange student to Italy and during my free time, I worked as a receptionist in one of its (here referring to Italy) hotels." (?) I'd just say 'in a hotel'.
Best wishes, Clive