You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I am Katherine Hall. I have planned a trip with my friends in December month and their ticket were confirmed. So, can you please help me in another flight ticket booking for me from DEN to IAH?

ASSISTANT: Your travelling dates please?

USER: Sure, I would like to airborne on 12/25 and recur back on 12/27.

ASSISTANT: There is a direct flight, can I proceed for booking in 1016 flight?

USER: Yes, you can confirm my flight ticket booking.

ASSISTANT: Your booking is done in Spirit airlines.

USER: Thank you for your immediate response in my flight ticket booking.

ASSISTANT: Thank you for choosing us.