please read 2 cases below and mention how can resolve my challenge with Amelia? 

case 1: A customer schedules his appointment. Let us say a slot of 2 hours from 2:00 pm - 4:00 pm. He comes to office and we start at say 2:15 p.m. and end by 4:30 pm. I see no place where I can mention the actual hours consumed by the client. I wonder, if in the back end, where we go and edit the appointments, there could have been a column for actual time consumed. which means although the session was scheduled for 2 hours, the actual time and duration was 2:15 - 4:30 which is equal to 2 hours 15 minutes. 

case 2: An existing customer [coaching / therapy client] calls me over a phone to give me a feedback. This call is being made by him to report his progress in life. Originally the call was not supposed to be billed and it was intended to be a short call. Hence no monetary aspects were involved. But somehow, the same call lasts for 1 hour 30 minutes and both parties mutually decide that the call must be billed for lets say 50 minutes and considered as a session. Now I go to Amelia. I Go to back end, go to customer, try to add an appointment. But it will not permit to book or log the session for the time slot which has already elapsed. I thing most therapist and coaches will agree that they do encounter similar situations.

Team Amelia must do some arrangements to clock these kind of time elapsed appointments, in above case 50 minutes. I think then Amelia can also use this added feature as a marketing edge, to increase its market presence.   

Till a full feature is ready, can you help me with :

Means: If we can have one Excel worksheet dedicated to each coaching or therapy client we can do the manual logging of actual timings. The file can be kept view only from the front end customer cabinet and editable from the back end.