What could be causing Mr Hall's cough?How long has Mr Hall had his cough?Is Mr Hall's cough getting worse or better?Has Mr Hall seen a doctor about his cough?Does Mr Hall have any other symptoms besides his cough?Has Mr Hall been taking any medication for his cough?Is Mr Hall's cough affecting his daily activities?Does Mr Hall have a history of respiratory issues?What remedies has Mr Hall tried to alleviate his cough?Have any family members or colleagues also experienced similar symptoms to Mr Hall's cough?