What structures do you use when having a call with your potential users? How long is the call?

I was wondering if you have a sort of structure/strategy when jumping on calls with your potential users. I used to sort of this structure: - Ice-breaking - which comes naturally by asking how to pronounce their names. - I ask about what they do - to understand their world model. - I ask questions - based on the book - The Mom Test and sort of getting to a point when I ask them about their past experience with the problem I am trying to present the solution to. - they ask me what I do - I try not to pitch here and answer honestly. (not always works, still working on that) - I usually mention the idea only at the end when I see that they actually have the problem our platform solves. It doesn't work always, but this is what I came up with so far. Do you have any advice, maybe you would like to share your own experience when it comes to talking to potential users? Thank you a ton! Vio