Mr. Shaller's answer is good. The downside of redirecting input from a file is that your manual input is now also subject to the loop so that users will have to know to hit enter (not provide a value) to end the loop. You might use your current logic for manual runs and do something like below when there is an input file ($1) supplied to the script (not redirected).
If you are confident that the format of the file will always be "name\nnumber\n" then you could do:
cntr=0
cat $1 | while read line
do
if [ $cntr -eq 0 ]
then
name=$line
cntr=1
elif [ $cntr -eq 1 ]
number=$line
echo "Your name is $name and your number is $number"
cntr=0
fi
done
This should print your statement until all name/number combinations have been read.