Where were you, Christine??

Sam did not know where to look for Christine. Where would she go?She did not inform him. She usually leaves office with Kylie and Lucy. He should call them and ask them about her. He called Lucy first. Lucy answered his call. He asked her-

"Hi Lucy, where are you?"

"Sam, I have reached my home. Why are you asking me?" Lucy was puzzled by his sudden phone call.

"Umm....I got a call from Christine's roommate and she said Christine is not yet back. Christine had probably given my number for emergency situations so she called me to enquire about her. Did Christine left office with you?" Sam tried to give a reasonable answer.

"Yeah, Christine was with Kylie and me. We had gone to that popular food joint near our office. What time her roommate had called you? We left food joint around 7. Christine should be at home by now. "