Rewrite this sentence: "The old man smiled sadly."
The old man smiled sadly.
The aged gentleman wore a forlorn expression as his lips curled into a smile.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Rewrite this sentence: "The old man smiled sadly."

### Response:
The aged gentleman wore a forlorn expression as his lips curled into a smile.