"No." Andrew replied expressionlessly.
Christina watched Andrew cautiously.
...
"I think this is wrong. He's making us lie and deceive others." Christina said, "It's wrong. If we haven't expelled the ghosts here, we shouldn't tell everyone we have."
"He just wants to sell the house, maybe at a high price." Andrew shrugged. "This task is really easy for us. We just need to stay one night, and two hundred gold coins will be ours. And even if we discover ghosts later, we can say we didn't notice them while we were here. Maybe the ghosts are scared of us, who knows?"
Christina looked at Andrew eagerly.
Helplessly, Andrew had to change his tone: "Alright, I used to be a Mercenary Corps Commander with a strong sense of justice, and I wouldn't do anything to damage my reputation. However, we can still take on this task; we just need to find out the source of the mysterious sounds in one night. If it's ghosts, we'll expel them."
"Ok." Christina nodded happily.