Dear Priyanka,
This employee of your's is in process of getting a new job, but he has not yet received any confirmation from other company he went for.So, this person will not say yes to you directly when you ask him regarding this matter. We have not yet overcame recession period.You are an AM-HR, i cannot suggest too much to you, only would like you to rethink the work culture going on, salary reasons, personal issues. You got to have a friendly and detailed chat with this employee on these different issues.