Ashton: Hey, unfortunately I can't mmeet with you tomorrow because of my test- it turned out that we're writing it after our lecture, not during it :(
Ashton: Do you have some free time on Friday, Saturday or Sunday? 
Ashton: If yes, I would like to catch up on lesson. ;)
Claudia: Hey, it's totally okay :) I mean, you did warn me - good luck tomorrow!!
Claudia: Hmm... I can make Saturday afternoon work - can't tell you the exact time, because I have an exam followed by a lecture, but I'll contact you once I know more :)
Ashton: Okay, so I guess Saturday? :)
Claudia: Unless something changes, stick to Saturday :)
Ashton: Thanks!!!
Ashton can't meet with Claudia tomorrow because he has a test. Claudia will confirm if she can come to the meeting on Saturday afternoon.