Given two separate sentences, join them into one using the conjunction 'but'.
She wanted to go. She was afraid.
She wanted to go, but she was afraid.
Complete the following task based on the instruction and optional input provided.### Instruction:
Given two separate sentences, join them into one using the conjunction 'but'.

### Input:
She wanted to go. She was afraid.

### Output:
She wanted to go, but she was afraid.