TREATMENT: In other clinical studies using T cells, some investigators found that giving chemotherapy before the T cell infusion can improve the amount of time the T cells stay in the body. Giving chemotherapy before a T cell infusion is called lymphodepletion. The chemotherapy used for lymphodepletion in this study will be a combination of cyclophosphamide and fludarabine which would be given in the days before the IMA201 T cell infusion. Two days after the last chemotherapy dose, the patient will be admitted to the hospital the night before the IMA201 infusion. The IMA201 treatment will be given at MD Anderson Cancer Center.