有约会to have an arrangement to meet

• 他们作出了“有问必答、有约必见”的承诺。

  They made a promise to answer all questions and to meet every time they had an arrangement to do so.

• 今天要很晚才能下班，因为有个病人跟她有约。

  Today she will not finish work until very late, as a patient has an appointment with her.