Hospedaje/hotel DF (Mexico City)

Voy a DF para viernes a sabado para asistir a unos convivios de Internations y realizar una cita medica el dia del sabado y por eso queria preguntar si hay hoteles con disponibilidad para una noche. Urge por favor, los cuales que conozco ya estan completos. / I will be arriving to Mexico City Friday and staying until Saturday to attend two Internations events and to go to a doctor's appointment. I am urgently seeking a place to stay for Friday night, all the hotels I know of I called and are full. Please advice if you know of anything. Thank you!