I am a bloody noob so hopefull someone can help me out here

I found the following code
$op_file = Read-Host "What food do you like?"
Write-Host "$op_file is awesome [IMG]https://us.v-cdn.net/6030959/uploads/images/smilies/icon_wink.gif[/IMG]"
Which basically looks like that
[PS] C:\>.\blurp.ps1
What food do you like?: Kebab
Kebab is awesome

Now I am using the following bits to add an alias to a mailbox
$Temp = Get-Mailbox -Identity Administrator
$Temp.EmailAddresses += ("smtp:backups.aaa@domain.com")
Set-Mailbox -Identity Administrator -EmailAddresses $Temp.EmailAddresses
Can someone tell me how I could incoorporate the first script into the second so I get the same input, but instead of "what food do you like" I get for example "Please input email" and it executes those three lines based on my input (changing
backups.aaa@domain.com based on my input basically) ?
Does that makes sense at all ?