You choices will be his fate in Hermes Lost, the person to whom you are speaking, will reach tens of different end with the messages you send in fictionalized history by being inspired from real events. There is someone on the other line of your phone, who is unconscious and doesnt know where he is and you are the only one he can talk to!
Your decisions may cause upsetting, happiness, hurting or losing the life of the character you are speaking of! Just like life, there is no turning back in choices!
You are going to learn his past with your decisions and you are going to help him to save him from where he is!