The two main characters in the given passage are John and Lisa.
John and Lisa were walking through the park on a sunny day. They stopped to admire the flowers in the garden and talked about their plans for the future.
### Instruction:
Identify the two main characters in the given passage.

### Input:
John and Lisa were walking through the park on a sunny day. They stopped to admire the flowers in the garden and talked about their plans for the future.

### Response:
