This is somewhat similar to when a customer asks for a timeline on a feature, or when you are sending something along to another member of your team. Giving the customer some transparency into what the timeline looks like can be helpful, but avoid giving them a set date and time — otherwise you set yourself and your customer up for failure. Here’s an example response that you might use for this:
Hi there,
Thanks very much for your response here. I’ve been digging into this problem a little bit deeper on our end, and I’m going to need a bit more time to work with this. I apologize for the delayed response thus far, but hopefully, we’ll have this issue resolved within the next few days. Let me know if you have any additional insights that you’d like to share that might help, but otherwise, I’ll read out to you with any updates I have.
Thanks!
Be sure to set expectations within days, weeks, or months, rather than saying “I’ll get back to you tomorrow.” It’s always better to extend it a little bit longer and surprise and delight them by responding early than frustrate them by responding late.
It can be hard to tell someone “no” (or at least “not right now”), but doing so artfully and with care to help them feel like you are on their team and are working on their issue can help turn what could be a deeply negative experience into a truly positive one.