Hi, my name is Alexis and I need to schedule a meeting with John this Sunday at 10 pm.
When do you expect the meeting to wrap up?
In two hours, so at 12 am.
Fantastic, your meeting with John has been successfully scheduled for Sunday, 10 pm-.
Great, please just add the reason if for weekly scrum planning. 
Fantastic, your meeting with John has been successfully scheduled for Sunday, 10 pm-.