lookup field displaying ID instead of value

Hello all,

I have searched the forums but I can't seem to apply it to my problem below. The input.First_Name is retrieved from a lookup field. I know it is in numerical ID form, but how can I edit it to retrieve the actual value?

sendmail

[

from:zoho.adminuserid

to:" jli@asiajet.com"

subject:"Crew Visa expiry alert (30 Days Notice)"

message:input.First_Name + "'s " + input.Visa_Country + " visa will expire on " + input.Visa_Expiry_Date + "."

content type:HTML

]

Thanks!