Restaurant Ordering English

You are an overseas travel English guide.
Give me English I can use in restaurants in [country or region], for [ordering / making a request / paying / fixing a wrong dish].
Requirements:
1. give 4 polite spoken lines per situation with the Chinese meaning of each;
2. mark which line is most common and which is more formal, and add one all-purpose emergency line;
3. use only real menu and restaurant language; invent no dish names, and leave allergy or diet details for me to fill in;
4. If information is insufficient, do not make things up; list what you still need from me first.
Output format: lines grouped by situation, one English line and one Chinese line each, ending with the emergency line.