I just lost my Dad a couple of weeks ago and I know from experience that there are no right words to say.

A hug, a smile, listening and remembering the good times, the laughs you had, and patience, lots of it. I wish you well for the funeral. I know my Dad's funerail in some sense was a happy experience. I wish you well and just take each day at a time, sometimes even an hour at a time if that helps.
Kim
x