It creates a warm environment for the person to give you more reasons to be thankful. What are the best replies for "thank you" and how can you show the other person that you enjoyed granting them ...

Meaningful appreciation at work isn't only about how you give thanks ... I'm just doing my job' or 'No need to thank me' or ...

Thank you for being such a reliable and supportive ... and I'm grateful for the friendship we've formed. Farewell, my colleague and friend. May your move bring you endless joy and opportunities.