Yes recognizing prayer as a dialogue is not easy to do.
It takes a while. I didn’t think before it was a dialogue, until I spoke and read about it, and I wondered about how God speaks to us. The answer is God speaks to us sometimes through ourselves (voice, intuition…), through family, through friends, through events of Life, through acts, and so on.
and like nicky says is about Faith. Trusting God.
And anecdotal stories!!!..
I was having a difficult time going to confession. Where I live there is no ‘set’ confession time. You always have to call and make an appointment. I was having such a hard time with this. I prayed for help. The very next day our parish priest approached me and asked me when I’d like to go to confession. Just like that an appointment was made.

I put this down to an answer to prayer. And this isn’t the only time things like this popped up. Often I will say a prayer and at Mass that week someone will approach me with the answer I needed. It’s entirely random but I always give praise to God for His intervention.
Another story.
A friend of mine once asked God to show her that He loved her. She needed to know, desperately. She was in a very bad state mentally. She says when she got up and walked out of the Cathedral (where she was praying) she spotted an old man across the street. When their eyes met, he smiled… and she says in that moment she felt as if God had answered her prayer. Through that old man’s smile God let her know she was loved.
Maybe most people hear a story like that and they think; that girl is crazy but I heard her story and I thought: What faith that girl has!!!
And yet another story! During the most difficult week of my life (the week before I was called to the Catholic Church) I was in complete despair. The Lord had shown me the depth of my sin and I was bowled to my knees. I didn’t get off my knees all that week. I was overwhelmed by despair… overwhelmed by my own depravity… I prayed and I prayed to God and there seemed to be no answer. At the end of that week this man came up to me… this man I had never met before in my life… and he took my hand in both of his, looked me straight in the eye and he said: God bless you.
Don’t ask me why but in that moment I just KNEW that God loved me, had heard my prayers and had sent this man. I can’t even describe the feeling but it was amazing.
Anyway, those are just a few real life examples of how God can speak to us.

Maybe you read the stories and you think: But… maybe that wasn’t God? But the thing is, in the moment, I knew it was (and my friend knew it was).
Now, in the case of when you’re seeking a specific answer (should I take this job? should I go on this business trip? Should I do this, should I do that?) I believe God has given us intuition and our conscience to give us answers.
Phew. Sorry. I dooo like to type.