How do you say hotel telephone reservation in English?

Supplement: In order to save labor costs, general hotels don't necessarily arrange special people to engage in telephone reception reservations, sometimes they will also serve as receptionists, and sometimes they will set up special reservation departments (if they are reservation departments, they will not only accept telephone reservations, but also have other ways).

Do you mean the receptionist who accepts telephone reservations?

Telephone reservation attendant/receptionist