hello
Hello, how can I help?
I'm interested in viewing an apartment. Please schedule a viewing at North Hill Apartments for Saturday at 10 pm.
Could you give me your name, please?
My name is Ben and wait I already have a commitment then. 
When would you like the viewing to start?
Sorry about that. I have a crazy busy weekend.
It's no problem. Is there a time that works better? And have you already paid an application fee?
How about 3pm Sunday and I'm not sure if I've paid the application fee?
I am sorry, but there is no viewing available at your preferred time.