Send email Workflow

hello , 

I have 2 list 

List A to Contains Following info with the value

Title    Email Address

Title have user info and email have email address for those users

List B user input

User ID which is lookup from List A Title which have all the Email address . User select their user and submit the form. 

I want to create the workflowo which will send email to Email address in List A which will match the user

How can I achieve this?

Thanks