Altast Greeting  Suggested by donshottype 

Altast Greeting is perhaps the the most likely name for this script digitized in the early 1990s. It has various other names including Alto Greeting Script, Happy Birthday, Alton Greeting. None of them has a current legitimate download. The pre-digital font went under the name American Greeting.
Greeting card companies use their own names for the script. Crane calls it Kensington.
The image is rendered from the OPTI clone, released as Alto Greeting Script