Dialogue 9: explain a situation

-Hi Dean, how was your weekend?
-No bad thanks. Why do you ask?
-Because you told me that you were staying in on Saturday night, but I heard that you were at a party.
-Who told you that?
-Clara said that she'd seen you. How come you didn't tell me about this?
-Cause I was only there for an hour. My dad asked me to take my sister. I chatted to Paul for a while and then I left.
-Are you telling me the truth, Dean?
-Honestly, it's true! If you don't belive me, you an aks Grace.
-Ok, ok. I belive you. Sorry, Dean.
-That's Ok.