(In this scene, Celestia is flying after the TARDIS at rapid speed, trying to follow it's unpredictable flight course. Showing signs of exhaustion, she calls out)
"Excuse me! If you can hear me, are you in some form of trouble?"

(The Princess is introduced to the Doctor for the first time. She greets him formally, not knowing his name, she trails off.)
"Oh, pardon my manners. I'm Princess Celestia. It's a pleasure to meet you… Uh…"

(In a welcoming tone)
"I hope you enjoy your stay here in Equestria. Don't be a stranger. Stop by any time you may need anything."