Thank you all for the thoughtful replies.
It makes sense that if a client is not catching fish after say 30 - 60 min the guide should try some techniques or areas to see if fish are there, what lure works, is the client the issue or is it the fish/water, etc. hopefully he could do this in a limited amount of time, then when he finds something he can instruct the client with the new information. This makes sense and a limited amount is understandable.
BTW the guide my friend is going with charges $300/half day and $500 for whole day walk and wade on public rivers that I already fish (and always catch fish) on. No limited access areas. No meals or transportation provided that I can see.
Needless to say I will not be paying for his service, I can use that money for a new rod and reel or waders!
Thanks again to all