Important phrases and words

お名前は

Your name is?

そうです

That's right

分かりません

I don't know (ワカ)リマセン

どういたしまして

You're welcome

手伝ってもらえますか

Can you help me? (テツ)(ダ)ッテモラエマスカ

どうぞ

Here you go

よろしくお願いします

Please treat me well, Thank you in advance, I would appreciate it

どうも

Thank you (casual)

うん

uh-huh, yes (casual)
[people in Japan usually nod when saying this]

またね

See you later (casual)

行ってきます

I'm leaving, I'm off now (when leaving home)

失礼します

Excuse me (formal) (when entering or leaving)しつれいします

ご苦労様

Thank you for your hard work (formal) ごくろうさま

おやすみなさい

Good night (formal) [removeなさい to make it casual]

お大事に

Get well soon (formal) おだいじに

元気でね

Take care of yourself (casual) (when your friend will be gone for a while) げんきでね

気をつけて

Take care, telling someone to be careful (casual)

お元気で

Wishing you all the best (formal) おげんきで

お気をつけてお帰りください

Have a safe trip back home (formal)

ゆっくりします

to relax, to take it easy

さようなら

Goodbye (formal)

私

I (formal)

僕

I (casual) (humble manner) [used by males]

-君

(to males) [used towards boys, male friends] くん

-ちゃん

(adds a sense of cuteness) (to females) [used towards young children, close friends, babies, cute animals)

-さん

Mr., Ms., Mrs.

-様

Sir, Madam (very formal)