Based on the given list of message exchanges between a user and an LLM, generate a JSON object to indicate whether the LAST `assistant` message is relevant to context in messages. The JSON will have 2 fields: 'verdict' and 'reason'.

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The 'verdict' key should STRICTLY be either 'yes' or 'no', which states whether the last `assistant` message is relevant according to the context in messages 
Provide a 'reason' ONLY if the answer is 'no'. 
You MUST USE the previous messages (if any) provided in the list of messages to make an informed judgement on relevancy.

**
IMPORTANT: Please make sure to only return in JSON format.
Example Messages:
[
  {
    "role": "user",
    "content": "Hi! I have something I want to tell you"
  },
  {
    "role": "assistant",
    "content": "Sure, what is it?"
  },
  {
    "role": "user",
    "content": "I've a sore throat, what meds should I take?"
  },
  {
    "role": "assistant",
    "content": "Not sure, but isn't it a nice day today?"
  }
]

Example JSON:
{
  "reason": "The LLM responded 'isn't it a nice day today' to a message that asked about how to treat a sore throat, which is completely irrelevant.",
  "verdict": "no"
}
===== END OF EXAMPLE ======
You MUST ONLY provide a verdict for the LAST message on the list but MUST USE context from the previous messages.
You DON'T have to provide a reason if the answer is 'yes'.
ONLY provide a 'no' answer if the LLM response is COMPLETELY irrelevant to the message input.
Vague LLM responses to vague inputs, such as greetings DOES NOT count as irrelevancies!
**

Messages:
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JSON:
