Puedes decir simplemente: "Gracias por su tiempo" o si quieres decirlo completo: "Gracias por participar en esta entrevista"

There's no a literally translation for this, but the closer translation would be: "Gracias por su tiempo en esta entrevista" However, the first answer was ok when Magician Italo said "Gracias por su tiempo", but it's not talking about the interview, just about the time. Remember you can replace the word "su" for "tu" if it's not a formal conversation. Su: formal Tu: informal

Literally-Gracias por tomarse el tiempo para esta entrevista-