First of all, why does your friend need your opinion on the girl? If he’s mature enough to get married- he should be mature enough to make his own decisions, & certainly not have his friends scootch her out…
Also, before calling her a liar, perhaps she made plans in the hours between the date and your wife calling her? Perhaps she’s tired and doesn’t want to eat out, perhaps she’s uncomfortable?
Before you potentially ruin a shidduch, think a bit.