Dear ，
Iwanttointroducetoyouthebearerofthisletter，myyoungersister，.Sheisgoingtotakeone-monthtrainingin University.Sheisalivelyandlovelygirl，whomIamsureyouwillliketomakefriendswith.
Butsinceitisthefirsttimeshegoestoastrangecity，Iamalittleworried.Iwouldbeeversoobligedifyouwouldbesokindastomeetherattherailwaystationandacpanyherto Universitytoregisterforthecourse.Shewillhavenoproblemwithheracmodation.Ihopeitwillnotcauseanyinconvenienceforyou.Bytheway，mysister’smobilephonenumberis.
Thanksverymuch.
Sincerelyyours，