What I've done in with interviews where I don't have the exact situational experience they're looking for, is I recall a situation that was similar, mention that it's not exactly what they asked for, and then go ahead and answer the question relative to that experience.
Many times, when they ask a specific question, they're not hard-locked on getting an exact answer that is 100% directly related to that exact situation. They're also looking to see how you might slightly redirect the question to something that is relevant to your experience, and then how you answer that.
Of course, sometimes they are hard-locked onto an exact answer to that precise situation, and if you don't have that experience, then you're done. You're not likely to know in advance if that's the case, but at least you got more interviewing experience, and you learned of another place that you do not want to work.
Many times, when they ask a specific question, they're not hard-locked on getting an exact answer that is 100% directly related to that exact situation. They're also looking to see how you might slightly redirect the question to something that is relevant to your experience, and then how you answer that.
Of course, sometimes they are hard-locked onto an exact answer to that precise situation, and if you don't have that experience, then you're done. You're not likely to know in advance if that's the case, but at least you got more interviewing experience, and you learned of another place that you do not want to work.