In the most recent General Confernce Elder Nelson gave a talk on missinoary work. In his talk he said just as the title says "ask the missinonries". He not only said that but he also said that they can help. Here is the link and video to his great talk.
http://www.lds.org/general-conference/2012/10/ask-the-missionaries-they-can-help-you?lang=eng&media=video
Hope you enjoy it.
