doubt that she is "interested," and the next move is "up to you."
Probably she will soon come into the office to see her father, in
which case you should have ready at hand some appropriate gift,
such as, for example, a nice potted geranium. Great care should
be taken, however, that it is a plant of the correct species, for
in the etiquette of courtship all flowers have different meanings
and many a promising affair has been ruined because a suitor sent
his lady a buttercup, meaning "That's the last dance I'll ever
take you to, you big cow," instead of a plant with a more tender
significance. Some of the commoner flowers and their meaning in
courtship are as follows:

Fringed Gentian--"I am going out to get a shave. Back at 3:30."

Poppy--"I would be proud to be the father of your children."

Golden-rod--"I hear that you have hay-fever."

Tuberose--"Meet me Saturday at the Fourteenth Street subway
station."

Blood-root--"Aunt Kitty murdered Uncle Fred Thursday."

Dutchman's Breeches--"That case of Holland gin and Old Tailor has
arrived. Come on over."

Iris--"Could you learn to love an optician?"

Aster--"Who was that stout Jewish-looking party I saw you with in
the hotel lobby Friday?"