Attendant (noun)

1. A person who is present at an event or location and is available to help or serve others.
2. A person who is present with and assists someone else.

Origin:

Late middle english: from old french, present participle of attendre "wait for", from latin attendere "give attention to".

Examples:

1. The flight attendant greeted the passengers as they boarded the plane.
2. The museum attendant was available to answer questions and provide information.
3. The attendants at the wedding were dressed in black and white uniforms.
4. The attendants at the spa provided towels and robes to the guests.
5. The patient's attendant stayed with him throughout the night.