Formatting a Message Box

I have error messages that appear if a user doesn't not complete set actions in a sheet. How can edit these i.e. make a single word bold or put a return (space) between lines.

MsgBox "Your scoring of this call is incomplete, please recheck ensuring you have completed all the mandatory boxes for this type of call before re-submitting. (This data has not been moved to the Database)"

I would like this to display like -

Your scoring of the call is incomplete, please recheck ensuring you have completed all the mandatory boxes for this type of call before re-submitting.

(This data has not been moved to the Database)

Is it possible to centre align ??

I've got a few to work on but this will do the job.

Thanks you....