Hmmm, Receiver - someone's not convinced. Nay, uncertain. So much still to consider! Unwilling to commit as yet to any particular decision, the matter under discussion is still one of significance to the Bearer, and to answer with such ambiguity is to invite further discussion.
Penny for your thoughts?,
We need to talk, or
You intrigue me are often useful for this purpose, depending on the gravity of the situation; particularly understanding Receivers can offer assistance with
Can I help? or request instructions with
What do?, whereas those rapidly losing patience with the Bearer can communicate this with
One last chance,
WTF? or
About time. Should the Bearer’s uncertainty mark a shift in the relationship,
You've changed or
What's happened to us? make this explicit, and
Is this the end? requests reassurance for the future.