do not validate arrival_city_name, it is not always present
do not validate arrival_city_name, it is not always present

cdorros/southwest-checkin,softdevbeing/-southwest-checkin,cdorros/southwest-checkin,nickaknudson/southwest-checkin,softdevbeing/-southwest-checkin,echo0101/southwest-checkin,nickaknudson/southwest-checkin,echo0101/southwest-checkin,echo0101/southwest-checkin,nickaknudson/southwest-checkin,cdorros/southwest-checkin,sguha00/southwest-checkin,sguha00/southwest-checkin,softdevbeing/-southwest-checkin,sguha00/southwest-checkin