You only jump into the water when YOU are ready. No body can rush you whatsoever.Then he began saying, "What can I do for you?"
I said I had lost a lot of air looking around for my fin, which he had managed to retrieve.
I said, I think we should terminate the dive, since I was exhausted and I had burned a significant amount of air looking for the fin.
He said again, "How can I help you dive?"
I could see he didn't want to cancel the dive and I had nowhere else to go, so I said, I need some more weight.
You should had told the guide that you want to terminate the dive. You do not need his/her permission to call the dive. It is your dive/life.