You can use a few different phrases to say thank you in English :

(F) Thank you very much indeed.
(F) That was very kind of you.
(F) I really appreciate this/what you’ve done.
(SF) I can’t thank you enough.
(SF) Thank you so much.
(SF) Thank you for all your help.
(I) Thanks (a lot/very much)!
(I) Thanks a bunch.
 

English Phrases in Situations

• General phrases
• Saying hello
• Saying goodbye
• Phone conversation
• At the bank
• At the supermarket
• At the market
• At the chemist's
• At the hotel
• At the restaurant
• At the cafe or bar
• At the post office
• At the travel agency
• At the doctor's
• At the dentist's