Test: Checking conv3_classification.json...
SUCCESS: conv3 correctly classified as needing reply
Reason: The user is directly mentioned in message ID 1649751 (@**Mathieu** is likely a typo for @**Mathieu Virbel** as per the prompt and message ID 1649744, and message ID 1649276 also mentions @**Mathieu**). Additionally, the last message is a question/prompt from sender 70, which implies a reply is needed from someone, and Mathieu is a contact.
conv3 classification test passed!