[解析]
W:Are you all alone,Tom?Why not ask Mike to help you collect money for the Children's Centre?
M:Well,he is working on his lab report.Could you come?
W:I'd love to, but I won't be available until next week. I think Cathy will have some free time this week. Do you want me to pass on a message?
M:That'd be nice.Thanks,Jane. AB