reassure

The captain spoke over the intercom to reassure the passengers during the severe turbulence.

(Chinese) 机长通过内部通话系统讲话，以在剧烈颠簸期间让乘客安心。

I tried to reassure my sister that I would be home in time for her graduation ceremony.

(Chinese) 我试着让妹妹放心，我会准时回家参加她的毕业典礼。