四个人,有趣一点的 长一点的英语对话. 购物时的.

There is a family members are shopping in a shopping mall.They are father,mother and Tom.
Mother waved to Tom," Tom,here I found a green sweater ,I think it will nice fit on you and cheap as well."
Tom " Ok,let me have a look.I like the color but don't like the design,the zip around pocket looks very strange."
" Don't worry,we can try to find a different one,here are plenty of sweaters!" said the father.
"We'd better to ask the assistant for help."said the mother.But after a short while,mother shouted to Tom," I have found a very nice sweater,you will definitly like it."
"This will make my little Tom more handsome !" said the father.
Tom walked quickly and got excited himself," Wow,I am surely like it,the color is even better than the first one and here is no strange design,but the size is a little small for me."
"Do you have a L size for this sweater?" asked the mother to the shop assistant.
"Yes,Madam,here is the L size sweater.Will you have it "asked the assistant.
"Yes,how much is it?" asked the father.
"40 pounds after discount." answered the assistant.
"Oh,my god!I couldn't find my wallet!I must have left it in my other jacket at home." shouted the father.
"And I have just payed for our lunch at KFC so I don't have enough money to buy it."said the mother with worried complexion.
"Oh,What a pity!" Tom said sadly.