I'd like to ask about a polite way to say "I can't (do something for you)". I'm sure the answer will depend on the context, so specifically, I'm curious about how to convey "I won't be able to answer the phone from..." over email in a business setting.
My attempt is:
My specific questions are:
- Is しかねる valid for politely giving this type of "excuse" for why you can't do something?
- Can できない also be used for politely giving this type of "excuse" for why you can't do something? (e.g., "電話で対応できませんが…")
- If neither of these are polite/appropriate in this case, what is a better alternative?