part-time job

After I took Japanese certificate examination,
I worked part-time job at hotel's cafeteria as waitress.
I was temporary staff.
This cafeteria was not so busy, so I thought it was easy.
But, a manager came and I took me out to Japanese restaurant.
He said that I wanted somebody to help this restaurant.
So, I came to work here. This restaurant was busy.
I felt like getting back to cafeteria.
I thought I came here as waitress of cafeteria.
I was very tired.