Generate a descriptive phrase for a river at dawn.
"The river at dawn, a serene, misty oasis mirroring the warm hues of the rising sun and gently flowing with tranquil calmness."
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate a descriptive phrase for a river at dawn.

### Output:
"The river at dawn, a serene, misty oasis mirroring the warm hues of the rising sun and gently flowing with tranquil calmness."