person A: I am very uncertain if the fuel will be enough to drive me to the next station before I can buy
person B: Oh no! I hope you can make it! 
person A: If it goes off. I might have to walk for 1 hour to the station 
person B: Whoa_comma_ that's quite a walk! I hope that doesn't happen. Do you have anyone to call for help?
person A: There is no one to call because I am a visitor in this town 