Bash script that checks for package dependencies and installs them if necessary

I'm new to Code Review and new to writing bash scripts as well. I was wondering if I could get someone's advice on a part of the script I'm working on.

Intended purpose of code

Check if a package exists using dpkg, if it doesn't, offer to install it for the user. This snippet is part of a larger script that installs a particular Conky configuration along with all of its dependencies with minimal effort from the user.

Concerns

• I feel as though there is a more elegant way to check if a package is installed using dpkg (code was found on stackoverflow).
• Is there a better way of handling the (y/n) response?

Here is the code that I am using:

declare -a packages=("conky-all" "lm-sensors");

for i in "${packages[@]}"; do
    if [ $(dpkg-query -W -f='${Status}' $i 2>/dev/null | grep -c "ok installed") -eq 0 ]; then
        echo "$i is not installed, would you like to install it now? (Y/N)";
        read response
        if [ "$response" == "y" ] || [ "$response" == "Y" ]; then
            sudo apt-get install "$i";
        else
            echo "Skipping the installation of $i...";
            echo "Please note that this Conky configuration will not work without the $i package.";
        fi
    else
        echo "The $i package has already been installed.";
    fi
done