Does a girl's conversation with young men during the day in Ramadan invalidate her fast and require her to make up the days, given that she does not remember the number of days?

The fast is valid, and neither a make-up fast nor an expiation is required, only sincere repentance from everything that displeases Allah, for He says: "And He is the One who accepts repentance from His servants and pardons sins, and He knows what you do."