Do not assume that indecision suspends the request or its stated deadline. Clarify the appropriate action for the actual case.
Keep the decision process tied to the real notice
Record the request and obtain the relevant instructions before relying on silence as a strategy. A private reconsideration period does not itself change an official date or establish how the government will treat the case. Treat responding to the request and deciding whether to continue as separate actions, since acknowledging the request procedurally does not commit anyone to a final answer on the larger question, and staying silent on the larger question is not the same as staying silent on the request itself.
Identify what specifically happens if the request goes unanswered, since some notices carry a stated consequence for inaction while others are more routine, and the appropriate response depends on which kind is actually in front of the applicant. If withdrawal is ultimately the intended outcome, obtain the specific written procedure for a formal withdrawal rather than letting an unanswered notice be interpreted as abandonment, since each can carry different consequences even when the practical result looks similar. Asking for clarification about that procedure, in writing, does not itself indicate a final decision either way.
Keep each communication dated and filed under the specific notice it answers, so the sequence of what was asked and what was sent remains clear if the case is later reviewed.