你能捎个口信，说我无法拜访他吗？
Could you pass a message that I won't be able to visit him?
哦，是你！请问你可以捎个口信给他吗？
Oh, It's you! Could you take a message for him, please?
我可以替你捎个口信吗？
Could I take a message?
给她捎个口信？
Give her my message?
你能帮我捎个口信吗？请告诉我妈妈我中午不回家吃午饭了。
Can you take a message for me? Please tell my mother that I won't go home for lunch.