Chotto onegai ga aru no desu ga, tetsudatte itadakemasen ka?

I have a small favor to ask; could you please help me?

Raishuu no kaigi no junbi o kare ni onegai shimashita.

I asked him to prepare for next week's meeting.

Moushiwake arimasen ga, mou ichido setsumei o onegai dekimasu ka?

I am sorry, but could you please explain it one more time?

Buchou ni onegai sareta shigoto nano de, kyoujuu ni owaraseru hitsuyou ga arimasu.

Since it is a task requested by the department manager, I need to finish it by the end of today.

Ryokou no aida, petto no sewa o tomodachi ni onegai suru koto ni shimashita.

I decided to ask my friend to take care of my pet while I am traveling.

Korekara douzo yoroshiku onegai shimasu.

I look forward to working with you from now on.