Small correction~

こんにちはko n ni chi ha(ha is generally pronounced as wa)

"Hello"

ありがとうございます a li ga tou go za i ma su

"Thank you"

すみませんsu mi ma se n

"Sorry"

"ごめんなさい"go men na sa i

private Chinese peopleですwa ta si ha(wa) qiu go ku jin de su

"I am Chinese"

There is also a sofa

Welcome (いらしゃいませ) i la shya i ma se

Thank you for coming and welcome again (ありがとうございます.またおこしください) a ri ga tou go za i ma su . ma ta o ko shi ku da sa i

I understand (かしこまりました) ka shi ko ma li ma shi ta

Please wait For a moment (しょしょおまちください) shyo shyo o ma chi ku da sai

Here please (どうぞこちらへ) dou zo ka chi ra he (read ei)

What's the matter ?(なにかごよありますか?) na ni ka go yo u a ri ma su ka

It may be useful

I am room service (ルームサービスです)ruu mu saa bi su de su

It’s over（おわりました）o wa ri ma shi ta

Hello / You’re welcome / Thank you (どうも) dou mo (The most amazing sentence Yes)

Yes, good, right (hai)

No, no (ii e) Read (yiye)

Also!

Shit, shit (also means: TMD, damn, holy shit!) クソ! kuso!