Hi Santosh. You can ask in a formal tone and there might be a probability that they might refuse too for the same. At the top of the job listing, tap the "Ask for a referral" button, then select the person you'd like to reach out to. Once they have given you a referral, thank them and express gratitude towards them.

Hi Santosh, if you want referrals on LinkedIn you can tap the top of the job listing, tap the "Ask for a referral" button, then select the person you'd like to reach out to. I recommend you personalize your message. Remind them how they know you. Share why you’re a good fit. Highlight why you’re interested. Let your network help you connect to your next opportunity.

Hey, Here are a few tips for you. 1. Find people who are working in your target company. 2. Prefer people who are working in the same domain. As in, if you're a frontend developer, it is better to ask a frontend developer to refer you for the available position. They can judge you better based on your resume and your skills. 3. LinkedIn allows you to send messages to a limited number of people. Prefer people who’ve been active on LinkedIn in the past one month. Here, activity means a like/comment/post/share.