How to include service provider's contact info in confirmation mail

I would like the confirmation mail sent to the client to contain contact info of the booked provider. When I use EMAIL or PHONE the mail returns the info of the Client, and he know that already!
The info is typed in the user list of WP, and should be called from there. How can it be done.

PS: I want to write to the Client:
Feel free to contact SERVICE_PROVIDER by mail (mailto:serviceprovider@fff.gdr) or phone (222-333-444).