Telegram bot - forwarding to a chat with the ability to respond to the user?

Question

Bots

I am writing a bot like @LivegramBot, the task is - the user writes a message to the bot, the bot forwards the message to the support chat, the operator writes a response to the user. I do forwardMessage(chat_id, from_chat_id, message_id), the message is forwarded, but there is no way to write a response to the user as in @LivegramBot. How to implement a response to the user already from the chat?