Translation of Tranche

Naturally, like everyone else, Italian think about themselves that they are the best. They think that Italy is a great nation and a great country, but these thoughts are never aggresive or political.
I told her that when you meet a person and you like that person you start dating him/her. After a while, if the couple stays together they go to the next step and move together or get married.
The travel agent's representative promised that they would return us the difference of the money. They also assured us that we would get special treatment, such as extra drinks and a Kayak expedition.