Waht would you say in the following situation

Waht would you say in the following situation
1.You do not hear someone's name when you are introduced to
2.You have to refuse an invitation to dinner with a supplier
3.You are offered foot which you hate
4.you want to end a conversation in a diplomatic way
5.You have to greet a visitor
6.You have to introduce two people to each other at work
7.You have to introduce two people to each other at a party
8.you have to propose a toast
9.Your colleague's been made redundant.
10.You arrive half an hour late for a business lunch.
Thank U very much~