The others are correct, no room service included in the MYW Dining Plan. It is "Participating Restaurants" for a) Counter Service and b) Table Service meals.
Your Dad could always order breakfast from Room Service and pay OOP if this is important to him. The plan offers so much food, however, I don't know how they would be able to eat all that is included if they have ordered a big breakfast in their room.
I hope this is not too much of a problem for them. Maybe you need to reconsider whether the Dining Plan meets there needs?
Good Luck!