Pienso que es mejor decir: "Ya no son haras de llamadas" y "Ya no son haras para llamar". Hay que comparar con otros amigos.

Take good care,

Friendly yours,

FELIX Joseph-Romuald 

Hola romuald,

Gracias por sus pensamientos. Hay que tanto aprender.

Jeraldina

an example of word bridging

hi there this lesson may help

You will need to train your ear to cope with this type of thing which is where the spanishpod lessons excel. Although you may think it would be better to hear people speak slowly and enunciate it is completely unnatural and will ultimately do you no favours. In the real world people will use contractions mumble swallow various letters and talk with diverse accents and the only way to cope with this is to practise listening to them do it (from day 1) hang in there, you've learnt how to do this once before, purely by listening. You can do so again. 

¿Qué horario tiene la oficina?
What schedule do you have at the office? 1 (What schedule do you have at the office?)

To my Norwegian mind it looks like there should be an "en" between "tiene" and "la", but I'm not sure.

No es una falta,podemos decir:

¿Qué horario tiene la oficina?: Aquí preguntamos el horario de la oficina en general,por ejmplo:

El horario de la oficina es de 9:00 a.m. a 6:00 p.m. (The office is open from 9 to 6.)

¿Qué horario tiene en la oficina?

Aquí se utiliza para preguntar el horario de una persona,en este caso sería tiene (Usted,Él o Ella ).

Su horario es de 9 a 6. (His schedule at the office is  from 6 to 9)