yup

Yup can be:

1. A: Do you want to go to the movies tonight? B: Yup, sounds like a good idea.
   A：今晚想去看电影吗？ B：是的，听起来不错。
2. A: Are you coming to the party this weekend? B: Yup, I'll be there.
   A：这个周末你来参加聚会吗？ B：是的，我会去的。