The phrase "ask that you indicate" is correct and usable in written English.
It can be used when requesting someone to specify or clarify something in their response or communication.
Example: "In your reply, I ask that you indicate your preferred meeting time."
Alternatives: "request that you specify" or "ask you to clarify".
We only ask that you indicate our website as the source of the material; see our copyright notice for more information.
If you do choose to do so, however, we ask that you indicate whether the call numbers are from Milstein or Butler Stacks, and that you give preference to call numbers found in Milstein.
Some scholarships will only ask that you indicate what your grades are.
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You want the producer to ask questions that indicate an interest in the story, what happens and why, but you never want a producer to ask "Can you explain that part to me again?".
The Negotiation: Even though the toys are cute, the sharks ask questions that indicate skepticism almost immediately.
Ask questions that will indicate your audience's level of tech knowledge.
He asked that the companies indicate in writing by Friday what contacts they have had with the administration or "any entity" working on the website project, and for a "specific description of any and all problems brought to your attention".
Keep other people talking by asking questions that indicate you've been listening and would like to know more.
And they ask questions that indicate they've been trying to follow, not ones that indicate that they are actually on Facebook (the blue and white reflection of which I can see on your eyeglasses, American students who are telling me they are NOT on Facebook during lectures of vital importance).
By doing this, you're communicating to your boss and co-workers that your time is not valuable; you give it away frequently and without being asked, and you never indicate that there's anything else you'd like to do with your time, and they might even be convinced that you enjoy staying late and working extra hard.
