Rewrite the following sentence using a more formal tone, and provide the output.
Hey, what's going on?
Greetings, may I inquire as to what is transpiring?
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite the following sentence using a more formal tone, and provide the output.

### Input:
Hey, what's going on?

### Output:
Greetings, may I inquire as to what is transpiring?