At the end of the question there is an option like
Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook.
But I could not find an option to contact somebody in tex.stackexchange itself.
Is there anyway that I can send the link of my question to someone requesting the answer?
By-design, StackExchange does not have any feature of direct user-to-user communication.* The aim of the network is to build up knowledge/Q&A with general scope, which is almost always the opposite of what user-to-user communication would be for.
*The one exception is that moderators can directly contact users, but this is for serious moderation issues only.
