1. Excuse me, would you mind paying it first
2. Excuse me, it is out of stock, would you like to have something else ?
3. Would you like to have an egg tart too ?
4. Would you like to pay more for other things ?
1. Excuse me, would you mind to pay this first?
2. Excuse me, we currently don't have this in stock, would you mind to look for something else?
3. Would you like to have an egg tart?
4. If you pay $$$$ extra, you would get XXX. Would you take one?