"Dear <her name>".
Now - if the card has "Happy valentine’s day" or simiar written inside, put the "Dear <her name>" above it.
"I am the person who asked you for the time at <whatever time she told you it was - eg. 2:15pm>"
"I just wanted to tell you that you brightened my shopping day by seeing you today."
"I hope you have a wonderful day."
"Yours,"
"Sissy <your sissy feminine name>"
Don’t have anything to write on? Cross your legs like a sexy woman would sit. This should give you your sissy hose covered thigh to write on.
Continue when written.