That's a very seasoned scam, you got conned!
I was in a similar situation in Faisalabad next to my home about 5 years ago. The dude was in a white corolla, a lady was sitting beside him and a young child in the back seat. He told me a similar story - that they're from Lahore, came to Faisalabad on a wedding, forgot their purses in the wedding hall (surprisingly both of them) and needed to go back to Lahore, 1500 rupees would be enough for them to refill and reach Lahore. As soon as he reaches Lahore, he will just drop the family, grab his wallet and come all the way back to Faisalabad to return me my money.
I was tempted after seeing him with family, but just when I was about to give him money, I asked him if I could keep his watch (a casio databank worth 2000 rupees) and I'll return it to him him when he comes back to return my money. I asked this really politely but his tone suddenly changed. He sat back in his car, hit the accelerator and was gone before I could see the look on his face.