My daughter is 8 and her go to reaction to pretty much anything is to cry 
A few things she cried for last couple days:
Told it's bedtime (this one happens quite a lot even though we do the 15/10/5 minute warning)
Couldn't do a trick on her air track and cried that she was rubbish and won't ever be able to do it
Told it was too late for a lollyice 
Accidentally hurt someone then she cried
Told she needed a shower
There's many more, feels like it happens most days. I don't get angry when she cries, I ask her why she's upset but she always just says she doesn't know. She's quite hard to talk to about emotions because she just kind of glazes over and nods and agrees but then carries on.
Any coping strategies that work? I think she cries when she's sad, angry, embarrassed, sorry.