My Father wasn't a JW when he passed away but was associated for years.
You might hear:
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We look forward to seeing your Dad again soon, he'll surely be in the resurrection.
Make sure you are there to welcome him back.
That's very kind of you to say...if there are indeed good things in store for mankind in the future, I see no reason why both Dad and I won't be a part of it as well.
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Are you planning to return to Jehovah?
Will we be seeing you at the meetings again soon?
The end is so close....we can't take any chances and miss out on everlasting life.
I appreciate your concern and I'm sure you'll understand why I might not want to answer that question just now.