"Thank you. Good morning."

Those examples are from the 19th century, when, as you have noticed, people often said "Good morning", "Good afternoon" or "Good evening", both when they met and left someone in the morning, afternoon or evening respectively. I remember as a small child noticing that my grandmother, born in 1890, did this. However this is very old fashioned and would be considered odd nowadays. People would be more likely to say "goodbye", although there are many possible parting remarks that people use.

Nobody ever says or said "Good night" when they meeting someone at night, only when parting.

Thank you~

It's very interesting to know the way people greet~

It might be useful to consider the origins of these expressions.

"Goodbye" is a contraction of "God be with you".

"Good morning" can mean "I bid you good morning" or "I wish you a good morning" that is, on meeting or on parting.

Occasionally, saying "good morning," "good day" or "good night" is an expression of dismissal. It's not necessarily friendly at all. If i got tired of you asking me questions, i might say "good morning," and then ignore you thereafter, meaning "I've heard enough, it's time for you to leave." This can only be understood in the context of the speaker's obvious displeasure.

Thank you~

Very helpful~