Can I change client's request from overnight stay to dog walk for them?

I have dog owners ask if I could change the request itself for them. I know it lets me edit days, dogs, price, and other things, but I don't see the option to change the type of request. Is this something only the dog owner can do? I haven't selected "book stay" yet because we talked and decided a dog walk is the better option for them, but they aren't tech savy and aren't sure how to fix it from their end. It would be simple if I could help her out from my end and change it for her.