public string SendMessage(string username, string message)
{
var userMessage = new TextLine(username, message);
var lastMessage = sessionService.CurrentSessionMessagesHistory.LastOrDefault();
var botReaction = conversationService.GetBotResponse(userMessage, sessionService.FullSessionMessagesHistory, lastMessage);
sessionService.AddBotMessage(botReaction);
return(botReaction.RobotMessage.Message);
}