Dear Mr. Driver/Phone Talker,
Yes, you are right, I should watch out when you change lanes inches in front of my car. Yep, I should watch out for you--you're busy after all. I know your phone call is more important than concentrating on your driving. I completely understand your need for me to get out of your way. Of course I get that your conversation is more important than my life, yeah I get that.
Thanks for letting me live today, I appreciate it.