SMM Bot API

Hi, 

I am pretty new to the lithium development. I am trying to leverage the new Bot API to integrate our Facebook messenger Bot with the Lithium response.

I was able to register the Bot by providing the required parameters. But when I tried the hand off API with the registered externalId and PSID details, I am getting a 404 error with the following message: 

 {
"status": "fail",
"message": "Failed to find bot conversation"
}

Appreciate help from anyone who has worked with the Bot API or experienced similar  issues before.

Thanks,

Sunita Dora