question:  How does Prantera initially gain trust with Temple-Tracy?
context: A gun is an interesting weapon; it can be hired, of course, and naturally doesn't care who hires it. The evening was dark, it was unlikely that the other even saw the circle of steel that was the mouth of the shotgun barrel, now resting on the car's window ledge. And at that moment, the universe caved inward upon Joseph Marie Prantera. A door slid open in the wall in a way that Joe had never seen a door operate before. The other spoke precisely and slowly, the way a highly educated man speaks a language which he reads and writes fluently but has little occasion to practice vocally. It opened on his approach, the door sliding back into the wall in much the same manner as the room's door had opened for Reston-Farrell. Joe Prantera stared at him, said finally, flatly, "What's it all about?" Reston-Farrell had approached the door by which he had entered and it reopened for him. Reston-Farrell, the one Joe had already met, was tall and drawn of face and with a chainsmoker's nervousness. Whatever the something else was, a slot opened in the middle of the table and a glass, so clear of texture as to be all but invisible, was elevated. Warren Brett-James said soothingly, "Prepare yourself for somewhat of a shock, Mr. Prantera. Brett-James said gently, "Hardly for one hundred and seventy years, Mr. Prantera." Reston-Farrell said, "Suffice to say, you are now one hundred and seventy-three years after the last memory you have." Joe Prantera's mind suddenly reverted to those last memories and his eyes narrowed dangerously. Reston-Farrell said, "Mr. Prantera, we have brought you from your era to perform a task for us." The two men of the future said nothing more for long minutes while Joe Prantera's mind whirled its confusion. "That is why we brought you here, Mr. Prantera.
output:  Speaking to him in Amer-English
options:  Giving him information about his opponents  Speaking to him in Amer-English  Revealing his potential assassins  Giving him a 1925 Old Calendar