Advanced Condition Column lookup between datetimes

Hi All I have 2 data sets that i want to combine as one. The first is a call data base where i have start and end time of the call The second is the time a ticket was submitted I want to capture the ticket number of each call

**Example Calls Data** Call Start Call End Username

21/08/2018 9:40 21/08/2018 9:52 Bob

21/08/2018 9:30 21/08/2018 9:42 Jane

**Example Tickets Data** Ticket Number Submited Username

123456 21/08/2018 9:41 Bob.Smith42

123457 21/08/2018 9:41 Jane.Bloggs17

The Third issue is the usernames don't match but i have many solutions for that. **Ideal Result** Call Start Call End Username Ticket Number

21/08/2018 9:40 21/08/2018 9:52 Bob 123456

21/08/2018 9:30 21/08/2018 9:42 Jane 123457

I can do this with Excel macro's or SQL, then load the dataset but i'd love to be able to do it directly through Power BI. Any help would be appreciated Thanks