Hereisasampleintroductionforarecommendationletter:"Thisletterservesasmystrongrecommendationfor[Candidate'sName]insupportoftheirapplicationfor[position/program/scholarship].As[yourrelationshiptothecandidate,e.g.,supervisor,professor,mentor],Ihavehadtheprivilegeofworkingcloselywith[Candidate'sName]for[durationoftime]andcanconfidentlyattesttotheirexceptionalskills,dedication,andcharacter.[Candidate'sName]hasconsistentlydemonstrated[keyqualitiesrelevanttotheopportunity],makingthemanoutstandingcandidate.Ihighlyrecommend[Candidate'sName]withoutreservationandbelievetheywillmakesignificantcontributionsinthisnextchapteroftheirjourney."Letmeknowifyou'dlikeanymodificationsoradditionaldetails.