It's a "Welcome" message said by the person who is the one that is already there. For example when you come to my house, I say "Pakhair Raghley" to you. When I come to your house, you say "Pakhair Raghley" to me.

Pa -with
Khair - lots of meanings e.g. okay/good/well(ness) etc.
Raghley - you come

I would answer "Khudai mo ubakha"/"Khudai de ubakha"

Khudai - God
Mo - (polite) You
De - (informal) You
Ubakha - Forgive/Accept

Not quite as easy to put into English, but you've got the equivalent of God Accept You in response to the welcome.

So once again, Pa Khair Raghley.