As we have already seen, in Italia choosing how to say 'you' depends entirely on your relationship with the person you’re talking to.
While 'tu' is for friends and family, 'lei' is what we call the forma di cortesia (the formal form) and is used to show respect and maintain professional boundaries.
'Lei' literally means 'she', but in this context, it is used for both men and women. Don’t worry — you aren't calling a man 'she'; you are just using the formal 'you'!
Even though you are talking to someone, you use the 3rd person singular (the 'he/she' form of the verb).
E.g.: