请帮忙写篇英语作文。谢谢大家了。

跟据下面的提示，写一篇英语短文，时态为一般过去时，第一人称。字数为100个单词左右。 1昨天下午我上街给爸爸买生日礼物。2坐公共汽车回家。3想到爸爸看见礼物会很高兴。4老人上车，让座，老人感谢。5我的感受。

It will soon be dad's birthday, so I went to buy him a present yesterday. Since it was long way to the place I bought the present, I took a bus there. On my way back, I was so excited, thinking how happy dad would be once he saw my present for him. Suddenly, an old man got on the bus. He was holding a walkingstick in his hand. I stood up from my seat and said:"Here, please." He smiled to me while he said thank you. People on the bus all looked at me with appreciation. I was so  proud. Dad was surely happy to see my present, but he was even happier when I told him I gave my seat to that old man. He said he was proud of me. Then I understand that helping others is also a way to make you feel better about yourself.