さて
Usage
At the start of the sentence (No casual conversations)
When introducing a new topic
Asking a question about the information just provided
Speaker is leaving Well; now; Well now;
Examples
ある日、うさぎと亀が競走をしました。さて、どちらがレースに勝ったでしょうか。
That day the turtle and the bunny have had a race.
さて、もう遅いですから、今日はこれで失礼します。
Well now it is late, excuse me I will go home.