As you all know, I have a genuine Lister and not a listeroid, but it can't be stressed enough that this chap is not just doing business with foreign customers (you lot) in a foreign country (USA) but he is dealing with people from a quite alien culture to his own, and doing so in your native tongue, not his.
He is to be commended for this, but watch out for "gotchas" in communications... for example....
1/ He will naturally try to please, and there is a tendency in many eastern cultures to be unable to say something that will displease you, so even if you luggage is missing, nobody will admit it, but you being from another land don't pick up the cues to tell that when someone says "Your luggage is not missing" they do not actually mean you luggage is missing, a local will stop asking for his luggage, accept it is missing, and move the discussion on to the next stage.
2/ The british army caused literal riots and uprisings in india, by handing out animal fat to lubricate guns with, western culture is full of references that will offend, "ran like a pig", "was a pile of bullshit", various religious systems and various caste systems.
One final point, when the british went out there originally to "impress" the "natives" with beads and buttons, they were humoured by a nation that had maharajas and so on and riches beyond belief, and exquisitely worked cloths and artifacts, but you are not maharaji, you can't put a man's eyes out for not doing something properly, or to stop him doing something for anyone else, you're at the end of a long chain of systems that all start in a country that is in some places still almost in the stone age in the technological sense, they are doing their best to become a "First world" country, but doing so in conditions that would destroy any western business over night.
This chap seems very eager to please his new customers in his new market, full marks, but try to meet him half way, and that means half way culturally etc too, try to understand and learn about your supplier, which I know is not how things are done now in the western capitalists world, but anyone buying indian listeroids has left the western capitalist world.