@Angela1328
we are off site hosts and have to come to meet my guests and let them in. So, like you, I need their exact time of arrival so I can plan my day. Some guests just book and don't respond afterward.
What usually triggers their immediate response is my message a few days before arrival :
Hello xx, it seems we still don't have your exact time of arrival but no problem, you can call us when you come to the location and we will do our best to come and check you in as soon as possible but keep in mind it could take about an hour. Have a nice trip and see you soon...