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The other person isn't necessarily waiting for the response. At the least, its a communication that you are about to ask them something, i.e. check back here in the next minute or so while I type out my question. Also, "Hi" is a good way of finding out if a person is present, sometimes you might ask to call them instead of typing your question. It also might be the case there are multiple people who can answer the question, so you want send out "hi" to a few of them to see who will respond right now. |
You can even send this to 3 or 4 people and let anyone who doesn't respond first say you caught so-and-so first and are good to go now. Or just delete the message.