A: "Welcome. May I have your tickets?"
B: "Here you go."
A: "Is anybody else traveling with you two?"
B: "No. It's just us."
A: "Do you have your passports with you?"
B: "Yes. Here it is."
A: "Would you like an aisle or a window seat?"
B: "Window seat please."
A: "Ok. I am placing you two in 21A and 21B.