How can I find polite customer greetings in English?

[Yegan]

I'm supposed to work in a great store and I want to learn a lot about customer greetings.
Does anybody know resources to find appropriate customer greetings and salutations?

regards

[Ralf]

In Britain and Ireland, the most common salute is

'How are you?'

and nice customers usually answer

'How are you?'
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