Remove the spaces from the following sentence: Once we receive your call, we'll send a fully qualified and experienced home security expert to visit your apartment (at a convenient time) to assess the property and to recommend the right system based on your requirements.
Oncewereceiveyourcall,we'llsendafullyqualifiedandexperiencedhomesecurityexperttovisityourapartment(ataconvenienttime)toassessthepropertyandtorecommendtherightsystembasedonyourrequirements.