Today's Mother's Day, my son's girlfriend sent me a text message to say hello. How to reply properly? ask for advice

Reply politely, thank some people and wish her mother a happy holiday? (ˊωˋ*)? You can say more. The future may be your daughter-in-law, which means the girl still cares. When their relationship develops further, you can invite her home for dinner and meet the children. Maybe you'll like it. It's not that a family doesn't enter a house. Sometimes fate is so wonderful that you can help yourself to snacks. You can help your son at a critical moment and make the other person feel that her mother is also an open-minded and reasonable person. This kind of family atmosphere will be very good.