also: けども
Casual conjunction/particle used to connect contrasting statements or to soften a statement. Often used at the end of a sentence to imply hesitation or to leave a thought unfinished.
I want to go, but I don't have time.
I have a small favor to ask, but…
Excuse me, I'm lost, so... (could you help me?)
I want to go, but I don't have time.