greeter

noun2

1. •
   A person who greets people on their arrival.

   • The greeter is standing most or all of the time, and the weather may be unpleasant at that time of the year. If the greeter can bring a folding chair to sit on in slow periods, so much the better. — 1976
2. •
   A volunteer who shows tourists around their home city or region for free.

   • The greeter system — a free service provided by volunteers — is popular in several cities throughout the world. — 2013