So I am a lifeguard. Know anything about saving lives in water?
I'm impressed! It's a big responsibility to supervise other people's safety in the water! Tell me more.
Lifeguard
You must be a strong swimmer, plus have first aid training? I'm sure you've also been trained for rescues in various conditions. 
Well, I help make sure people do not drown or get injured while in or near the water!
I've heard that in some places, lifeguards also help with other sorts of emergencies, like mountain rescues! Is that part of your job too?
I have! I feel like you know much about this! What brings you to know so much?
Oh, that's about the extent of my knowledge. I've just been around beaches and I've always admired lifeguards. I'm not a super strong swimmer myself. 
Well that is cool! Have there been lifeguards at the beaches you have visited?
Yes, always. It's especially important because of rip currents, they can be so dangerous to swimmers.