As a volunteer, how to encourage passers-by to fundraise?

To encourage passers-by to make fundraising donations, then you have to just tell him a warm and moving story, use your own words to impress passers-by around you, and pay more attention to your language and infectiousness when you speak.

I encourage others to make announcements on the side of the road, but also the specifics of the matter to tell him, and hope that he made some useful actions, one person to pass a positive energy, then our world will become more healthy, the same in the speech will be brief and concise, so that he can understand what I mean, and I try to minimize the time.