A 25-year-old woman comes to the physician for asthma management. Her asthma began in childhood and had been well controlled on moderate dose mometasone. She recently developed nocturnal awakening with cough and wheezing. She has been using her rescue albuterol 2-3 times a week at night. She also has occasional heartburn at night after eating too late but denies regurgitation or dysphagia. Her roommate told her that she occasionally snores at night. Her vital signs are within normal limits and her BMI is 26 kg/m2. There is no retrognathia. Lungs are clear to auscultation. Pulmonary function testing shows FEV1 of 72% predicated and FEV1/FVC ratio of 0.65. There is a moderate response to bronchodilators. Complete blood count is unremarkable. Which of the following is the best next step in management of this patient?