Emily Vancamp as Sharon Carter in “Captain America: The Winter Soldier”
Here’s an example of what we call a “soft no”. Sharon turns down Steve’s offer in a way that’s meant not to insult him but never actually uses the word “no”.
Steve clearly gets the message, though, and importantly offers to leave her alone. Sharon’s comment afterwards gives him an opportunity to try again later, but he doesn’t press and respects her rejection of his company even though it’s probably hurt his feelings a bit.
Just in case you ever wonder “What would Captain America do?”; there you go.