You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you book a flight ticket from DEN to SEA?

ASSISTANT: Sure, please provide me your trip dates.

USER: Ok, please can you book for the dates Sept 23 and 25 respectively?

ASSISTANT: Ok, do you have any preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Please book a ticket on the name Laura Baker.

ASSISTANT: Direct flight is available in Spirit airlines and the ticket fare is 200 only. Is that ok for you?

USER: Please book a ticket for me.

ASSISTANT: Laura Baker, your ticket is booked successfully and your flight number is 1007.

USER: Thank you for assisting me.

ASSISTANT: You are welcome.