Hello, I have two appointments in Madrid on the same day: [departments and appointment times]. The preparation instructions came from [sources and dates], and [items] need clarification. Please tell me the appropriate channel for submitting the instructions, which clinical department will coordinate a written response, and who will contact me. Is administrative rescheduling needed? If so, who handles it and how is the time confirmed? I am not attaching a full medical record or asking administrative staff to decide medication, dietary or examination preparation instructions.