ask for
phr. v..phr. v.. to say that you want something or want someone to give you something.
phr. v.. to request something; a transitive phrasal verb where the object represents the desired item, service, or person.
You should ask for the bill now.
If you are lost in the city, you can always ask for directions at a hotel.
The union leaders decided to ask for a significant pay increase during the next round of negotiations with the management team.
the object is usually a noun representing a thing, a price, or a specific person.
contrast with 'ask' (to pose a question); 'ask for' specifically targets the acquisition of an object or service.
I asked to the waiter for water.I asked the waiter for water.do not use 'to' before the person you are speaking to; the pattern is 'ask someone for something'.