Thank you very much, Ms. Patricia

Yes, it is correct, when you really want to emphasize a specific person doing an action. You can say "he is sending candy and you are sending flowers", no emphasis on either action. To emphasize the importance of the fact that you are responsible for the flowers, (for example, if the flowers were discussed before, and you are now re-stating the agreement) you say "he will send the candy and you, yourself, will send the flowers. This usage is called "emphatic usage of the reflexive pronoun"