One is, are you sure it's not a sales pitch? If so, direct refusal: Hello, thank you for your attention to my company, the company leadership does not allow the receptionist to transfer sales calls, thank you! Some cases are not necessarily marketing, you can ask him to leave his name and phone number and then report to the leadership before replying to him!
Two, direct refusal: Hello, thank you for your attention to my company, the company leadership does not allow the receptionist to transfer sales calls, thank you!