Rarely, if ever, should you directly ask for help. It's not a good look to say "Can you help me" or "What do you think" etc. However, you can definitely indirectly ask for/signal for help.
So:
1) State that you're now figuring out where to take this next (that's fine)
2) Recap the objective and the pieces of information you need (and have) to answer the question/hypothesis.
a) Hopefully this triggers something or b) You get a signal from the interviewer on a particular segment (they might probe you and say "is that all we need from bucket x?"
2) If this doesn't work, start to probe in different areas (i.e. do we know x? To double-check you already said y doesn't apply, correct?) etc. etc.
3) If really desperate, you can say something like "Has the client experienced this before or have any ideas they've come up with?" or "Have we observed something similar to this problem in the past that we can leverage?"
Rarely, if ever, should you directly ask for help. It's not a good look to say "Can you help me" or "What do you think" etc. However, you can definitely indirectly ask for/signal for help.
So:
1) State that you're now figuring out where to take this next (that's fine)
2) Recap the objective and the pieces of information you need (and have) to answer the question/hypothesis.
a) Hopefully this triggers something or b) You get a signal from the interviewer on a particular segment (they might probe you and say "is that all we need from bucket x?"
2) If this doesn't work, start to probe in different areas (i.e. do we know x? To double-check you already said y doesn't apply, correct?) etc. etc.
3) If really desperate, you can say something like "Has the client experienced this before or have any ideas they've come up with?" or "Have we observed something similar to this problem in the past that we can leverage?"