How to reply to each other's information when I receive flowers from my daughter and boyfriend?

Express gratitude and bless each other. Receiving flowers from my daughter's boyfriend to reply to each other's information can mainly express gratitude or bless each other. I can say thank you very much for sending me flowers. The days with you are my happiest time. I hope you two can be happy forever. I'm sure I'll be very happy to receive a gift from my daughter's boyfriend, but I also need to learn to express my feelings and say the right words to make the other person respect me more, so speaking skills are very important.