How to send email to Input field that is a drop down list with many choices

How to send email to Input field that is a drop down list with many choices

HI,

My app is being used to collect info from job applicants.

I have a "assigned to" field that is populated 'on validate' based on the location the person is applying to.  This assigns the responsible person to that applicant.

I tired using the "send mail" function in the script editor with the mail being sent as follows:

  To       :  input.Assign_To 

The email is not being sent???

Any suggestions?