What should I do - booking requested, but no communication from owner, even after repeatedly contacting them?

I am a new sitter/dog walker. My first request came in and I answered right away. Since then it has been radio silence. I offered a meet and greet two different times - even available over zoom. I asked for information about the pet and when might be a good time to meet both the owner and the dog and I have not heard a thing. The request is still pending, but I feel like I should turn it down. It's making me a little weirded out that they haven't responded AT ALL.