Emailing lookup field but placing this as an ID or number rather than text

Emailing lookup field but placing this as an ID or number rather than text

Hi there, 

First time poster and have been a user of Zoho Creator for approx 6weeks so forgive my ignorance as I learn to code. 

We have a need to send an email to a specific email address with some of the fields triggered by the submission of a form.

In the form their is a lookup field that pulls a 'Chlild_Name' from another APP. When i place the simple code snippet of input.name into the deluge code for the email. It displays as a series of digits. Any chance I can change this? 

The below is the code that I am using to send the email:

sendmail
[
from :zoho.loginuserid
to :"email address"
subject :"Payment Completed for" + input.Municipality
message :"Hi there Accounts please find attached a payment for <div><br></div><div>" + input.Child_Name + input.Sport_Club + input.Cost_Centre + input.Cost_Centre + input.Amount
content type :HTML
Attachments :file:input.Invoice_Submission
]

It also appears to rename the attachment with that string too, anyway to change this?

Help much appreciated.
Cheers
L