Colin: Hi. How was your day at school?
Tom: Good.
Colin: The test?
Tom: I should get a pass.
Colin: Was it difficult?
Tom: A little. 
Colin: You're not very talkative. Are you ok?
Tom: Yeah, it's fine. I'm just in a bad mood.
Colin: Can I help?
Tom: Thanks, dad. It's OK. Say hello to mom and enjoy your holidays.
Colin: Take care!
Tom: You too.
Colin is on holidays with mom and is checking on Tom how he's doing at school.