How can I get that lamp from the dwarf miner

Hint 1 of 6:

You need to be much more honest than normal for an adventure game.

Hint 2 of 6:

Have you explored the dwarves' home?

Hint 3 of 6:

Did you tidy up the house for the dwarves?

Hint 4 of 6:

Did you clean up again after the soup?