I am so sorry to hear that. 听到这个消息，我深表遗憾。
I am sorry to hear that.常用于表达慰问。
I am so sorry to hear that you have a bad cold.
听说您得了重感冒，我深表遗憾。
We are saddened to learn that your department is going to be closed.

得知您的部门将被取消，我们深表遗憾。

We want to express our heartfelt sympathy.我们向您致以诚挚的慰问。
在对方遭遇不幸的时候，可以用express heartfelt sympathy这样的短语。
We want to express our heartfelt sympathy. While there's nothing we can say that will ease your loss, we wanted you to know that you are always in our thoughts and prayers. We know how difficult this must be and want you to know that we are here for you.
我们向您致以诚挚的慰问。虽然言语并不能缓解您的失落情绪，但我们希望您知道，我们一直衷心地为您祝福与祈祷。我 们了解克服这一困难有多么不容易，但我们会一直支持你。