This paper focuses on the strategies adopted to tackle problematic input 
and ease communication between modules in a Spanish railway information 
dialogue system for spontaneous speech. The paper describes the design 
and tuning considerations followed by the understanding module, both 
from a language processing and semantic information extraction point of
view. Such strategies aim to handle the problematic input received from 
the speech recogniser, which is due to spontaneous speech as well as 
recognition errors.