Lomov visited Chubukov's house to ask for the hand of his daughter, Natalya Stepanovna, in marriage. He came dressed formally in evening dress and white gloves, and nervously requested Chubukov's consent. Chubukov joyfully agreed, saying he had long hoped for this proposal.
Source: The Proposal, chapter 9
The examiner expects two points: (1) the purpose of Lomov's visit — a marriage proposal — and (2) a supporting detail such as his formal attire or Chubukov's reaction. Quoting or closely paraphrasing the play ("I've come to ask the hand of your daughter, Natalya Stepanovna, in marriage") adds accuracy. Do not drift into the quarrel over Oxen Meadows — that is not the objective of his visit.