What do I mean by that?
When you enter a conversation with a specific and vital result in mind, you are pressured.
Just like a seller feels when he absolutely MUST make the sale, no matter what.
You want to be successful and impress, that is clear.
You may even want the target to find you attractive.
Therefore, you are so dependent on the desired result that you are too preoccupied with yourself. So, you miss important signals or fail to catch important information that your conversation partner might reveal.
So, relax! Be outcome independent. Focus on the conversation and on the conversation partner!