Answer:
arrangement for things to happen at the same time
Usually, a hotel receptionist greets customers or visitors and escort them to specific destinations...
So, I think it's:
"A hotel receptionist greeted a <u><em>customer</em></u><em> </em>or <u><em>visitor</em></u>."
Hope I helped :)
id need more details about the question in order for me to answer it.