Rewrite the following sentences using conjunctions: "I waited for two hours. My friend still did not arrive."
I waited for two hours, but my friend still did not arrive.
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite the following sentences using conjunctions: "I waited for two hours. My friend still did not arrive."

### Output:
I waited for two hours, but my friend still did not arrive.