Hi, my name is Ben. I would like to schedule a meeting with Michael for Saturday at 9 pm if he is available. 
When do you expect the meeting to wrap up?
I need 2 hours, so 11 pm
Would you like to note down an optional reason for the meeting?
plan project
Unfortunately Michael is not able to make Saturday @ 9 pm.
Would you like to try scheduling the meeting for a different day or time?
How abut 2pm on Thursday?
Fantastic, your meeting with Michael has been successfully scheduled for Thursday, 2 pm-4 pm.