In our daily life and work, when we say Thank you in English, we often use "four" words of thanks besides Thank You:

Generally speaking:? Thank you, thank you. I really appreciate it. I appreciate it.

A more enthusiastic statement: 1. You are one in a million. You are really a great person. ? You are the best. You are the best.

Thank each other: 1. Thanks to you, we arrived on time. Thanks to you, we can finish it on time. ? I couldn't have done it without you. I couldn't have done it without you.

More formally: 1. I really appreciate your help. I really appreciate your help. ? I really appreciate your help. I really appreciate your help. I want to express my gratitude.