Preventing some information from changing

Hi. I am using chatgpt3.5 turbo model and I want to fine-tune it on my set of questions and answers. it is working perfectly except for some parts.
in my answers, I have some information like names of individuals, their email addresses, phone numbers and so on which I do not want them to change. but when I fine-tune my model and use it, it always changes this information. how can I prevent this from happening?

for example, if I ask the model “who has fine-tuned you?” I want to get this answer: “Masoud has done this part and his phone number is 123456789.” I do not want “Masoud” and “123456789” change to something else.