Father with baby is turned away by airline, but then he finds this letter in his pocket

Ruben learned that he wouldn’t be allowed to be present during the birth of his child. Due to the complicated situation, he understood why… but it didn’t make it any easier. Did it make Ruben any less excited to become a father? Not at all. Ruben couldn’t wait to see his daughter. Thankfully, it wouldn’t be long before he got an important phone call. 

What was he told on the phone? Read on quick!