1
I want have dinner early today.
I want to have dinner early today.
After want, use to + infinitive: ‘want to have dinner’, ‘want to leave’.
2
We want that you come with us.
We want you to come with us.
I want the hotel has air conditioning.
I want the hotel to have air conditioning.
To say what you want another person or thing to do, put that person or thing between want and to: ‘want you to come’, ‘want the hotel to have air conditioning’. Do not use want that in this pattern.