Hi. My FILs have just offered to pay for some of me and my FIs wedding costs. We don't know how much yet. Even though they emailed both of us on our joint account, I feel like I should leave it up to him to reply and either accept or decline. But I do want to say thank you of course. How do I say thank you but at the same time not really accept or decline? I don't want to seem ungrateful nor greedy. Thanks for all input.