Examples of prepositions "for" and "to" 
 
We stopped off at the Goose for a drink and then we carried on to embassy for dinner.
 
I’m going to Brussels next week for an interview. I hope to work for the UN.
 
Do you want to have a drink at the Goose before we go on to dine with the ambassador?
 
I’ve come to Dublin to attend a seminar and to meet the new members of the faculty. But now I’m leaving for Rome.

 
To talk about the purpose of an action, we use a for + noun construction or a to + infinitive structure.