This story sounds a lot like the Netflix Norwegian-language produced series “A Storm for Christmas!” (filmed at the Oslo airport):
When their flights were canceled thanks to a snowstorm, strangers Andrea and Hollie ended up sharing a London hotel room for the evening. The two women bonded and years later consider each other best friends for life.
Source: Two strangers shared a hotel room. They became best friends for life | CNN
One is from Serbia but now lives in Canada. The other is from the U.S., but after college she took off on a 2 month global travel experience that had turned into 9 months when they both found themselves stuck at Heathrow in a snowstorm.