It is rude to keep a lady waiting

Lots of guys do this and it is not only rude but also very

There is no need to make appointments that you can’t keep, simply check your agenda before making that appointment. What if the same thing happens to you? Of cause you won’t like it, though sometimes you can’t help it because of unforeseen circumstances, at such times a simple call will make a huge difference instead of keeping her waiting. 

It’s a simple courtesy that won’t cost you a dime.