Η υπάλληλος στην υποδοχή χαμογελάει και λέει: «Μάλιστα, το Wi‑Fi είναι δωρεάν».

Υπάλληλος is a common-gender noun (it can refer to a man or a woman). The article shows the person’s gender:

• ο υπάλληλος = the (male) employee
• η υπάλληλος = the (female) employee
  The noun’s ending doesn’t change; the article does the work.

Yes. Both are common:

• στην υποδοχή = more “Greek,” slightly more formal/neutral
• στην ρεσεψιόν = very common in hotels, from French/English “reception”

Greek present tense often narrates what’s happening “right now,” like English “is smiling and says.” In context, it can describe a scene naturally:

• χαμογελάει = (she) smiles / is smiling
• λέει = (she) says / is saying
  Greek doesn’t require a separate “continuous” form the way English does.

Both are correct and common:

• χαμογελάει is the more explicit/“full” form (often in writing).
• χαμογελά is a shorter form (very common in speech and also in writing).
  Same meaning, same tense/person.

και λέει is a very natural way in Greek to link actions in a narrative. If you want to emphasize sequence, Greek can add something like:

• και μετά λέει = and then she says
  But it’s not required; the simple και often implies “and then” by context.

Μάλιστα is a polite, service-style response. Depending on context, it can mean:

• Certainly / Of course / Yes, sir/ma’am
  Here it’s like: Certainly—Wi‑Fi is free.
  It can also mean I see / right in other contexts.

Loanwords in Greek are very often treated as neuter by default, especially for “things/tech”:

• το Wi‑Fi, το ίντερνετ, το email (common patterns)
  So το is the neuter singular article used with Wi‑Fi.

δωρεάν is typically indeclinable (it doesn’t change form). It can function like:

• an adverb: είναι δωρεάν = it’s free (of charge)
• an adjective-like predicate: το Wi‑Fi είναι δωρεάν
  You don’t make it masculine/feminine/neuter; it stays δωρεάν.

Greek commonly uses guillemets:

• opening «
• closing » They function like English quotation marks, just a different style.

In Greek speech it’s often pronounced something like:

• γουάι-φάι (very common)
  You’ll also hear a more English-like ουάι-φάι depending on the speaker.