This happened a year ago when I went to an old city on holiday.

    It was in the afternoon. I could feel the heat of the sun while walking around the city for the (one) time.  Then I decided (stop) at a restaurant and eat my late lunch. I sat outside restaurant and ordered my food. I was playing with my phone while waiting for my food. Just then a tall man came near me asked if I had spare money. He didn't look like a beggar(乞丐)because he was wearing nice (cloth). I asked him what had happened. He told me that he just came here for a holiday. When he wanted to buy some water at the bus station, he (find)his wallet and phone were gone. He (real) didn't know what to do.

    "You must be hungry .Come and join me for lunch. It's my treat."

    After having our lunch I gave him some money .He asked my number." If I have a chance I will visit (you) city and pay back," he said.

    "Don't think like that. It's my pleasure to help you. You can pay it forward—when someone (need) help ,help him or her," I replied.

    He smiled and said goodbye. I smiled,.