if you want to Book Southwest Airlines Flight Be wary of companies that don’t disclose their physical address: They may be located in a different country, and you are often unable to reclaim money lost in the case of disputed credit card charges. It’s prudent to check the company’s website for contact information like a mailing address or phone number. If you call the company and there is no one to speak with you, consider this a major red flag. Check online customer service platforms as well – poorly run businesses are unlikely to have a team available during reasonable hours over multiple platforms.