Hospital

When Calvin frowned, Elsa sighed and said "Today, when I am returning from your apartment, I bumped into Aunt Mary." 

"So, Mom told you?" Calvin asked

"She asked me why I am standing out when I have right to go in and I told her that I don't know the passcode of the main door. So, she told me that's my birthday. I was shocked, why would someone keep my birth date as their passcode?" Elsa sighed and said

When Clavin didn't say anything, she asked " So, when did you kept my birth date as your passcode?"

"Umm... I just love that date." Calvin sighed and replied

Elsa rolled her eyes and asked, "Do you think I will believe it?" 

"Fine, I want to keep something special as my passcode and your birthday is so special to me. So, I kept it as my passcode." Calvin smiled and said

"You are unbelievable." Elsa helplessly shook her head and said

"El" 

"Hmmm." 

"We just have few hours to land." Calvin sighed and said