There are generally patterns as to what is said to one? I would just make a list of the 10 most obvious questions I'm asked and come up with stock replies and make them open ended so I can talk more about a subject and it will have a better chance of being one I like?

"What do you do for a living?" -- I'm in school studying X. That way you can talk about X if you get stuck. You know about X so your mind won't go as blank.

"How are you?" -- I'm great! I'm in school studying X and hope to start the first nonprofit on Mars

"How are you?" -- I'm great! What have you been up to? (puts the focus back on the other person)

Just do a few back and forths on paper based on what has actually happened? practice asking the other person questions about themselves and come up with "bizarre" answers like nonprofits on Mars and then pick up on what the other person says and what you would find interesting about that and what you would ask next, etc.