Asked a girl out on Tuesday to go see a movie with me Saturday, she agrees. I text her today telling her we've got to see another movie, the one we were going to isn't playing anymore. I tell her we'll see a different movie.
"Okay!! What time?"
Tell her place and time.
"Damn. Wait hold on I think my friend is having her birthday dinner Saturday night, let me text her and ask her."
"She's having it at [two hours before set time for our date]"

What do I do. She seems fairly interested. How do I respond? I'm not free to do it tomorrow night. Should I reschedule? Radio silence? Is she trying to flake? Give it to me straight