The lover's father has passed away and a funeral will be held tomorrow. What should I say? If I am far away, I can't go.

First, tell ta that you are as sad as ta.

Secondly, tell ta that you can't come because of xx, please forgive me.

Finally, tell ta that although it's hard, you must take care of yourself, because someone in the distance will always care about ta.

I think after three steps, you should be able to show sincerity.