privateGPT not give out an answer related to question ask

[swloo618]

I have a pdf file is about company basic info and some product info. When I ask question "How I can contact you", the answer give out

Enter a query: how I caontact you?
How can we help with your question or problem related to contact lens care, cleaning and maintenance of the lenses ?
How can we help with your question or problem related to contact lens care, cleaning and maintenance of the lenses ?

Question:
how I caontact you?

Answer:
How can we help with your question or problem related to contact lens care, cleaning and maintenance of the lenses ?

How come the result is like above and it's totally not related to the content in my PDF document?