I agree, that the best communication happens in the case, when both partners are interested in. For example, on dating websites or in forums with common interests. 

Moreover, to start conversation with new partner is rather boring in all cases. Because you have to tell about your life the same information, to ask the same questions and you won't remember most of all answers of your new friends. 

I think you shouldn't start conversation from ordinary phrases. First of all, you should amaze and be interesting for your partner. And of course you can do it when you have some knowledges in studying language.