Listen to a conversation between two students.Tina, I'm so glad I bump into you.Hey, Bob, what's up?Well, you know how I told you I could work for you tonight? Cover you shift at the dining hall later?Yeah, thanks so much for that. Friday night dinner shifts are tough to find substitutes for.Well, actually...Oh, no! Don't tell me something came up and you're canceling?Um, yeah, I'm afraid I forgot tonight I've got a music rehearsal for the band I'm in.Music rehearsal?Yeah, I play keyboards for Little Rock Band here on campusand we've got practice tonight to prepare for a concert we're doing that's coming up. It's really kind of important.Well, I don't know what to do now because I already made plans to go to the school's play with some friends tonight.Yeah, and there's no way I can find someone else to work my shift now. It's so last minute.I'm really sorry, Tina.Well, I guess I could cancel my plan to see the play.Go see it another time by myself since my friends are seeing it tonight.I think it's playing for another week.Or, you know, I guess I could talk to the band leader explain to him that I can't make the band practice tonight.Yeah, I mean, it's my fault I forgot and I want to do the right thing here since I did say I'd work for you.It's just that some of the songs are new to me and tonight's our last practice before the concert.I don't want to sound bad at the show.