How to replace a phrase with differing characters in a Word document?

I’m on a Mac if that helps. Specifically, I’m trying to copy and paste a skype conversation that was sent in short phrases. However, skype does not have a feature where I can copy and paste conversations without timestamps (trust me I tried). So to avoid having to go through and delete the timestamps one by one, is there a way to use the Edit>Find feature to do this? I can’t enter an exact phrase because while they are all from the same date and person, the times obviously differ. So how would I be able to select all of the different times?

Example of what I need to delete:

[11/10/13, 10:12:05 PM] John Smith: