My AI assistant cant access my file

API
,
1

I’m facing a problem is AI assistant can’t access the file format pdf and Thai language.
here is my code.

PS. I’m new to this so everyone can tell me what should i do. thank you.

files = client.files.list()
file_id = files.data[0].id

assistants = client.beta.assistants.list(
    order="desc",
    limit="20",
)

assistant_id = assistants.data[0].id

thread = client.beta.threads.create(
    messages=[
        {
            "role": "user",
            "content": "can u tell detail all documents",
        }
    ]
)
run = client.beta.threads.runs.create(
    thread_id=thread.id,
    assistant_id=assistant_id
)
print('run.id: ' + run.id)
run = client.beta.threads.runs.retrieve(
        thread_id=thread.id,
        run_id=run.id
    )
print('run.status: ' + run.status)
thread_messages = client.beta.threads.messages.list(thread.id)
print(thread_messages)

result

I currently do not have access to the content of the file. Could you please provide me with specific questions or information you are looking for within the document? This way, I can assist you more effectively.