Dehydration of Phenyl-1-propanol with any suitable catalyst like p-Toluenesulfonic Acid or Potassium Hydrogen Sulfate will eliminate water from the alcohol
Reference:
https://www.thevespiary.org/rhodium/Rhodium/chemistry/p1pol.elimination.html#khso4 (https://www.thevespiary.org/rhodium/Rhodium/chemistry/p1pol.elimination.html#khso4)