An essential advice in selling is to give people what they want or a solution to their problem. You can decide people’s problems by listening for words such as “want”, “wish”, “like”, “dislike”, “need”, “help”, “hope”, etc.
If you want only a win-win situation, just recommend people right at the very moment when they reveal some of their problems to you. For example if someone is wrestling with his phone to work well which is a common thing today, you could instantly recommend a service center or an online platform from where he could get his phone fixed.
When you feel trouble getting anything out of someone, just ask a few questions such as “what do you wish to accomplish in the coming few months?”. You’ll definitely get an answer and you could recommend him a solution to its relevance without offending him.