Gratitude, Compliment, and Congratulation

Gratitude is expression that used to say thank you to other people.
Kind of gratitude expression are :  

• Thank you / thanks
• Thank you very much. 
• I’m grateful to...
• I want to thank.
• I want to express my gratitude to...
• I keep forgetting to thank you for... 

Respond of expressing :

• You are welcome.
• Don’t mention it.
• Not at all.
• It was nothing at all.
• No problem.
• Glad to be of help.
• (it was) my pleasure.
• I’m glad I could help.
• I’m glad I could do it.
• I’m glad I could be of help.
• Anytime ?

Compliment is expression that used to give praising to other people. Some people use compliment to batter up someone or to flatter in order to increase good will.
Expressing :

• What a nice dress
• You look great
• You look very nice
• I really must express my admiration for you...
• Good grades 
• Excellent
• Nice work

Time to express compliment :

• On his / her general appearance
• If you notice something new about the person appearance
• When you visit someone’s house for the first time
• When other people do their best

Congratulation is expression that used to say congratulate to someone when get a success
Expressing :

• Congratulation
• Let me congratulate you
• My congratulations on you successful business
• Congratulations on your promotion
• Good
• That’s great !
•  Isn’t that wonderful
• How fortunate
• Splendid !
• Pretty good !

Responding : 

• Thank you.
• Thanks, I needed that.
• That’s very kind of you
• It’s very kind of you to say that.
• Do you really thin k so ?
• You’ve made my day !
• The same to you.
•  I’m glad to like it.
• Thank you. It’s nice of you to say so.