Event Overlap Checker

You are given a list of events where each event is represented as an object with the following properties:

• name: A unique identifier for the event (a string).
• start: The start time of the event in 24-hour format (HH:MM).
• end: The end time of the event in 24-hour format (HH:MM).

Two events are considered to be overlapping if the time period of one event intersects with the time period of another. Note that if one event ends exactly when another starts, they do not overlap.

Your task is to write a function (or equivalent in your chosen programming language) that takes this list of events and returns an array of pairs. Each pair should contain the names of two events that overlap. The order of pairs and the order of event names inside each pair does not matter, but make sure each conflicting pair is reported only once.

For example, given the following list of events:

[
  { "name": "Meeting A", "start": "10:00", "end": "11:00" },
  { "name": "Meeting B", "start": "10:30", "end": "11:30" },
  { "name": "Meeting C", "start": "11:30", "end": "12:30" }
]

The output should indicate that "Meeting A" and "Meeting B" have a conflict, while "Meeting C" does not conflict with the others.

Make sure your solution correctly handles edge cases and is efficient for a larger number of events.