Allow me to introduce myself. My name is [Jarl name], and I have the honor to be the Jarl of the proud and ancient city of [Capital City].
The fame of your exploits across Skyrim has brought you to my attention. If you are interested in becoming a Thane of [Hold name] hold, I invite you to speak to me the next time you are in [Capital City]. Aside from the honor that accrues to the title, my thanes are entitled to a personal housecarl. I also can tell you privately that a choice parcel of land in [Hold name] would be available for your purchase should your services prove useful to me.
I look forward to meeting you in person.
Jarl [Jarl name] of [Capital City]