You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Hall.

ASSISTANT: How may I aid you?

USER: Can you please book me a flight ticket from DEN to LAS?

ASSISTANT: Sure, may I know your travel dates please?

USER: Sure, my planned travel dates are Dec 25th and Dec 27th.

ASSISTANT: There is a connecting flight from Spirit airlines with a fare of 100, shall I proceed with booking?

USER: Ok, please proceed.

ASSISTANT: Your booking is done with the flight-1002.

USER: Thank you for the quick service.

ASSISTANT: Welcome.