Her panic-stricken host family had called the language school and the police. At 4am a formal missing person alert was issued, saying Alanazi had been last seen at Britomart when her brother, also here for a three-week English course, put her on the correct bus. Her family had told police she would struggle to ask for help.
After a sleepless night for all involved, the good samaritan dropped Alanazi at the school.
Police spokeswoman Natalie Swart said the woman had done the right thing by helping but added it would have been "helpful" if she had thought to notify the police.
The Herald on Sunday agreed not to name the language school at which Alanazi was studying. Alanazi had been given a cellphone to use during her stay.