  One distinctive feature of low-luminosity active galactic nuclei (LLAGN) is
the relatively weak reflection features they may display in the X-ray spectrum,
which can result from the disappearance of the torus with decreasing accretion
rates. Some material, however, must surround the active nucleus, i.e., the
accretion flow itself and, possibly, a flattened-out or thinned torus. In this
work, we study whether reflection is indeed absent or undetectable due to its
intrinsically weak features together with the low statistics inherent to LLAGN.
Here we focus on NGC 3718 ($L/L_{\rm Edd}\sim10^{-5}$) combining observations
from XMM--Newton and the deepest to date NuSTAR (0.5--79 keV) spectrum of a
LLAGN, to constrain potential reflectors, and analyze how the fitted coronal
parameters depend on the reflection model. We test models representing both an
accretion disc (Relxill) and a torus-like (MYTorus and Borus) neutral
reflector. From a statistical point of view, reflection is not required, but
its inclusion allows to place strong constraints on the geometry and physical
features of the surroundings: both neutral reflectors (torus) tested should be
Compton thin ($N_H<10^{23.2}$cm$^{-2}$) and preferentially cover a large
fraction of the sky. If the reflected light instead arises from an ionized
reflector, a highly ionized case is preferred. These models produce an
intrinsic power-law spectral index in the range [1.81--1.87], where the torus
models result in steeper slopes. The cut-off energy of the power-law emission
also changes with the inclusion of reflection models, resulting in constrained
values for the disc reflectors and unconstrained values for torus reflectors.
