Formula for automatically setting a 'start date & end date'?

I am wondering if there is a formula I can use to automatically calculate the start date and end date of a job based on the first and last time recorded spent on it (please see screenshot).

I am tracking design jobs from the date they are started to the date they are last worked on. They can be worked on for a large period of time period of time and it would be useful to have the end date automatically set to the last date time was logged on it.

Here, I have manually entered the 'start date' of 08/11/2018 and the 'end date' of 09/11/19. This particular job was only worked on for those 2 days. Is there a formula I can put in the cells E13 and N13 here to do this automatically. It would be something like 'the first value of the row from cells 'P13' onwards and the last value in the row I would need.

If I was to work on this job today for example, that 'end date' should change to 27/08/2019.

I hope this makes sense!