Alex is having trouble with Siri and using his contacts in iOS 9. Leo says that sometimes connecting a third party app like Facebook to contacts will cause multiple entries and that can confuse Siri. Especially if the contact in question has no phone and has the same name as the one that does. So it would be a good idea to merge his contacts. He should log into iCloud as well and see what his contacts look like. It's likely that Siri is just using a contact that has no number so it can't call or send a text. Merging the contacts will fix it, and it'll clean up his contacts as well.