Send an automated reply through wixchat

Some background about my website :
Registered tutor can post about themself on our website and students who are interested in their service can click on the button below “Chat ID” to send a message like “Hi ,I am interested and would like to learn more” to the tutor through wixChat

I try to achieve this by using sendMessage() in the wixchat-backend api but seems like it is only possible to send the message from visitor/user to business or vice versa and not from user to user

Another possible solution i can think of is the getChannel function
The getChannel() function returns a Promise that resolves to the requested channel.
So is it possible to get the channel id of a user by using this function to solve my problem?