Snapchat Relationship

Kevin replies, " I'll Face time you so we can talk instead of type."
You answer the Face time call. You start talking about the movie. You bother think it is a great idea to go Friday at 7pm.

On Thursday, Cathy sends you a text. The message states, " I'm so sorry to tell you this, but I am unable to go to tomorrow."
Should you still go with Kevin and Derik?