Many a times when our friends or family members host a get together or party, we inform that we are pre occupied I mean we are busy in our work place. The friend or family member request us to try to attend and it would be fun. When we say we will try - obivsouly we are saying we are not going to attend. We can also make ourself observe the times we say " I'll Try" and we notice even we were free, we did not attend.in simple words if some one say I 'll try that means that he/she will not attend.
The thought that comes to my mind is are we really busy? and are we really dont have time?.
Obiviusly no, we are very free.
We always say that we have lot of work, suppose if we dont go for work for some reason like sick or other, still the company runs. It requires manpower but not specificly you.
so enjoy the time !