A 35-yeаr-оld mаle presents tо the primаry care clinic tоday convinced he has a "sinus infection" and says he would like an antibiotic to help him feel better. He says he has felt bad for about 48 hours and states that his cough kept him up the last two nights. Data obtained include the following: Complaints of fatigue, headache, cough, nasal congestion, and mild fever. Vital signs: temperature, 98.1°F; pulse, 90; respiration, 20; blood pressure, 98/68. Harsh nonproductive cough noted. Lungs clear to auscultation. No facial pain/pressure. Nasal discharge is cloudy white. No lymphadenopathy noted. Which of the following is the appropriate treatment plan for this patient?