When i woke up one day ?

One day he woke up warm and tired.He was sleeping late,just returned from the ugly night shift.May be he has lost track of the time.He looked out of the little window of his.It was dark outside.His mind was also lost in the darkness.
Half asleep,Half awake,he dialed his mother,"I want to talk to Dad and he his is not picking up".
"May be he must be in the office,call the other number,beta",the voice was heavy.
"What happened,beta?",she asked.
"Ma,I haven't talked to him since a  long time.I want to give him the good news that his son has got a promotion.He is now senior engineer"He said without taking a breath.
The breath was growing heavier on the other side.Suddenly,a death silence covered the the whole room.
The son realized.
His father had passed away one year ago.
                                           
A true incident.I really miss him.