Option A: 'Would you mind lending me the money?' is illogical because the following dialogue in relation to the first person statement b includes the word 'please,' implying that the person saying the first dialogue is assisting the person saying the Person B. As a result, the options make no sense and are thus incorrect.

Option B: 'Will you buy some fruit on the way back home?' is illogical because if person A asks person B to buy fruits, why should the B person offer money to person A? As a result, this option is incorrect.

Option C: 'Shall we go to the opera tonight?' is more than just a suggestion, it's an expression of an idea. The appropriate response will be 'Yes, okay' or something along those lines. The following sentence, in which the money is requested, is illogical. As a result, this is the incorrect option.

Option D is correct: 'Shall I get you a ticket to the Madonna concert?' Person A assists Person B by obtaining the tickets; Person B must pay Person A the amount required to purchase the tickets; thus, this dialogue is ideal for the situation. So, option D is the correct answer.