2-- Sure. Is it your father's birthday?

1-- Don't you know? Tomorrow is Father's Day.

2-- Oh! How could I forget such an important holiday?

1-- You also need to choose a gift for your father, right?

2-- Yes, let's go.

===================================
注解：
 
1.choose挑选  
2.important重要的     
3.also也 

===================================
译文：

1--我想给我爸爸买个礼物， 你愿意陪我一块儿去挑吗？

2--当然可以了。今天是你父亲的生日吗？

1--你不知道吗？明天是父亲节。

2--噢，我怎么把如此重要的节日忘了呢？

1--你也需要给爸爸买礼物吧，对不对？

2--对，我们一起去吧。