A:Oh,there is something wrong with this oven.Where is the waiter?
B:What's the matter,Sir?
A:The oven is not good,it doesn't work well.
B:Let me have a look at it.
A:The machine is a little broken inside.Did it exist before you bought it?
B:I don't know.But when I use this oven for the first time,it is not useful.
A:Let me have a check first.
B:Ok,here you are.
A:The machine's quality is not good.I am sorry and I will give you another oven.
B:I hope it will be better this time.
A:Ok,I will be more careful.Here is another one.
B:Thank you!Byebye!
A:Byebye!