Question

"I have come to you, hounoured Stephen Stepanovitch to trouble you with a request. --- who is the
Speaker? who has come to Chubukov with a request?
what does Chubukov assume about the purpose of his visit?
What is the request? How does chubukov react?​

Answer 1

Lomov is the speaker in the above lines.

Lomov had came to Chubukov with a request.

Chubukov assumed that Lomov had came to borrow money from him and made up his mind that he won't give anything to him.

Lomov had came with a proposal for Natalya.

After listening to the request, he acts nicely with Lomov as he had came with a proposal for his daughter.

Hope it helps :)