Translations for reassure in French

Here are paragraphs from public domain books translated:

As he spoke, it was evident that he was afraid I had known Marguerite as he had known her. I hastened to reassure him.	En parlant ainsi, Armand paraissait évidemment craindre que je n'eusse connu Marguerite comme lui l'avait connue. Je m'empressai de le rassurer.
The Lady with the Camellias, by Alexandre Dumas son	La Dame aux Camélias, de Alexandre Dumas fils