General objectives of the stage: Reception is the second stage of the Attack of the Saints mission. This stage has a more open structure, giving you a chance to move more freely around the area. You should use this opportunity and explore your surroundings before attacking two new nuns.
You begin the exploration of the reception in a safe area. Use this opportunity and interact with a medical station to regenerate Agent 47's health bar (he's lost some health during the attack on the motel at the beginning of the mission). The main area of the reception is occupied by a guard and Dijana Radoncic when you begin this stage, however they'll soon leave and go different ways.
If you're playing on lower difficulty settings, then the game will allow you to explore the reception without having to worry about being spotted. On higher difficulty levels it's a more complex situation, because there are additional guards in the area. One of them will occupy a side room (screen above) and at least one more will occassionally enter the building.
You should be able to notice a second captured civilian (motel's owner) near the reception. This person is being taken to a side area where the assassination will take place. If you plan on saving this civilian, then you must follow him and the Agency soldier. Make your move (fiber wire is my recommendation) when you'll get to the area seen on the screen above. Important - Saving the civilian may be very difficult on pro settings, because there will be additional guards nearby. If you don't want to risk of being spotted don't go for a direct takedown, but try to kill the Agency soldier from afar (preferably with a Silverballer).
The area where the Agency soldier planned on killing the civilian (screen above) is important to your current primary objective, because you can use it to get closer to the gas station and to assassinate both nuns at the same time. If you're playing on lower difficulty settings, then you'll most likely encounter a single stationary guard. On higher settings an additional soldier will be patrolling the area and he should die in the first place. You can use throwable objects or a nearby radio to distract enemies and to eliminate them when they're alone.
The main square in front of the station is always occupied by Agnija Radoncic and it's difficult to explore to this area, even if you're using a proper disguise. I recommend using all the gathered instinct and/or to distract enemies by activating car alarms. Checking this square has a single purpose and that is to collect new evidence (screen above).
The last important area of the map is the one to the right of the reception building (screen above). It's much more difficult to explore it on the pro settings, because you'll have to deal with at least one extra guard. Just as before you should consider using interactive objects and car alarms to distract enemy units.