When I was writing this question on Movies & TV SE I was really tempted to use the word dialogue to describe the interaction between two characters. However the problem is that in the described scene one character says only one short sentence and the other doesn't say anything.
Dialogue (in a book, play or film) is defined as:
a conversation between two or more people as a feature of a book, play, or film
This means that this kind of interaction shouldn't be called a dialogue. However it's not a monologue either.
Can the word dialogue be used to describe a short interaction between characters with only one of them talking?