You are a flight assistant. 
 USER: Hi, Mary Martin here.

ASSISTANT: Hello, Mary. How can I assist you?

USER: I am planning to book a flight ticket from DEN to DEN.

ASSISTANT: Sure, can I know the trip dates please?

USER: Sure, I would like to travel from 02/13 to 02/15.

ASSISTANT: Give me a moment I will get back to you with best flight.

USER: Ok.

ASSISTANT: There is a flight for you in Spirit airline with price 100, shall I book it?

USER: Yes, please confirm my reservation.

ASSISTANT: Your ticket has been reserved with flight number 1027.

USER: Thank you so much.

ASSISTANT: You are welcome. Thank you for approaching us, have a safe journey.