Need to Correct the samples/python/semantic-kernel-multiturn, adaptive card is not triggering.

[venkatesh-sriramdas-ms]

Issue in Semantic-Kernel-multiturn python sample
Type: Need to correct the sample

What is your proposal?
In samples/python/semantic-kernel-multiturn sample I have found an issue that the Adaptive Card plugin is not being invoked actually.

Reason

1. When we initialized Chatclient in agent, we have not passed the service-id. (which is being used in adaptive card plugin)
2. In the Adaptive Card plugin, under get_adaptive_card_for_data, the chat history object initialization is having invalid attribute, the instructions should supposed to be assigned to the system_message.

I have corrected this behaviour and tweaked the prompt and found its working.

If this looks valid, I am happy to contribute to this sample. :)