visitor [noun]: someone who goes to or visits a person or place
receptionist [noun]: a person who works in a place such as a hotel, office, hospital, etc., who welcomes and help visitors
company [noun]: an organization that sells goods or services in order to make money
IT [noun]: information technology
polite [adjective]: behaving in a way that is socially correct and shows care for other people’s feelings
course [noun]: a set of classes on a particular subject, usually leading to an exam or qualification
allergic [adjective]: having an allergy or also caused by an allergy
manners [noun]: a set of rules or a way of behaving toward people that is socially correct or acceptable; a way of showing respect for people’s comfort and feelings