Here is a summary of the characters' plans and meetings:

• Andy has plans to meet Caroline for a discussion about their AI project on November 24 at 1 PM sharp under the oak tree. He also invites Diego to join them for dinner on the same day at 6 PM, making it a triple date with Mei.
• Samantha has plans to meet Caroline for a discussion about their AI project and other plans regarding stray cats on November 24 at 3 PM sharp under the oak tree.
• Diego suggests meeting Peter at the train station on November 25 at noon instead of under the oak tree, but they still plan to discuss their AI music project together. He also accepts Andy's invitation for a dinner date with Mei and Andy on November 24 at 6 PM.
• Caroline has plans to meet Peter for a discussion about their projects on November 24 at 5 PM sharp at the café, as well as a meeting with Andy for a discussion about their AI project on the same day at 7 PM.
• Mei plans to meet Peter under the oak tree on November 24 at 9 AM to continue discussing their AI project and exchange seeds for Peter's community garden. She also accepts Andy's invitation for dinner with him and Diego on the same day at 6 PM.
• Noor is not mentioned in any of the planned meetings or discussions, but it is likely that she will have her own schedule and plans related to the AI project.