Since they refuse to reply, I think we've won the argument by default.
He was angry but managed, with great self-restraint, to reply calmly.
Do you think it's significant that he hasn't replied to my letter yet?
Six people have confirmed that they will be attending and ten haven't replied yet.
The bank was expeditious in replying to my letter.
In a concluding chapter he gives personal commentaries on some of the earlier chapters, replying to critiques and issuing quite a few challenges.
She doesn't seem like replying to her and continues reading.
This alternative proposal is worth replying to at some length.