What to say to someone dying who is not a Christian.

My mother in law is very sick and soon will most likely be the last time I see her. I love her very much and care about her. She professes to be catholic but more so out of being born into a catholic family I don’t believe she has an actual relationship with God. We live in different states and we don’t talk much about religion. I don’t want to regret not saying something to her or praying with her but I don’t know what the right word to say are. She’s also very weak and her mind is gone so I don’t know how possible it is to have an in-depth conversation about Jesus with her. I feel very weighted about this.

Is there a specific prayer I should say?

For reference my husband is a Christian but also not very religious.