Go to signup page type you login, password and click sing up. You don't need email or mobile phone.
Search idea and write you request. For example, you can write request for play in online game, share you opinion about last football bowl etc
This is all responces on request from other users.
It's like private messages. You can initiate dialog only after user write responce on your request and then you can make dialog (about creting dialogs see next questions).
Go to My Requests, click Show responces and click Create dialog near target request.
In My dialogs sections. For single user you can make only one dialog, no matter, what counts requests by current user you responced.