8:15 AM - The train is very full. Sarah sees a backpack under a seat. No one is near it.

8:17 AM - The loudspeaker says, "Train will stop for 10 minutes." Sarah feels worried. She thinks, "Should I keep the bag or find the owner?"

8:20 AM - Sarah walks to the conductor. She says, "I found this bag. Is it yours?"

8:22 AM - The conductor says, "Thank you. We will check who owns it." Sarah feels happy. The train starts moving again.