Response size of ChatGPT 3.5 model

I was testing ChatGPT for training on a custom data. The model trains successfully on a set of PDF’s, but I never get a response of more than 50 lines, I am using gpt-3.5-turbo model and following parameters
max_input_size = 4096
num_outputs = 512
max_chunk_overlap = 20
chunk_size_limit = 600

Is there a way to increase the response size.