history: I don't think I'll be able to go to the lake this weekend, I'm pretty bummed out. I don't think I'll be able to go to the lake this weekend_comma_ I'm pretty bummed out. Awww what's wrong? Maybe going to the lake will cheer you up?
current: Yeah, I wish I could, but I have to house watch my parents house this weekend! Bummer.
next: That is a bummer! Well, you can go next time!