Business Partner is not any business process in SAP, but business partner play major part in many SAP business process (Bank Account Management, Loan Management etc.).
In the Dial S for Willie comic strip, SpongeBob's phone number is said to be 555-9196. This is a fake phone number because it lacks the amount of number digits in an actual phone number. It may have purposely been written like that to prevent people from actually trying to call SpongeBob SquarePants.
So in order to have a quick Airbnb.com contact customer support, you just need to punch these numbers, 855-424-7262 on your NX402 phone. So it means you should not be facing any problem in speaking to Airbnb.com's customer service representatives.