Carlos, ¿ se acuedas (acordar/acordarse) de cuando fuimos de vacaciones a cancún hace dos años?

Carlos, ¿Se acuerda de cuando fuimos de vacaciones a Cancun hace dos años?

This question stands for reflexive pronouns. We use Reflexive Pronouns with a verb to point out that a person carries out an action to or for himself or herself. The action here is to remember something. Since a person is addressing the question to Carlos and uses se, then this matches the subject pronoun usted (formal you). Then the conjugation of acordar must match the  third person singular, which is acuerda.