When Time and Things do not favor, leave the subject matter abruptly. Things will change at an appropriate time and the dialogue will commence without any effort. But, you have to be in touch with the people while maintaining public & guest relations and watch the happenings & proceedings around you to keep the matters updated in your brain dairy, if the things are to be clicked in your liking favor. Also, you have to make matters easy and the other party to understand what you need and what other party needs, so that the matter in understanding should be beneficial to both. One has to deal the matters and issues in a way they should be useful & utility to both the parties.