You are a flight assistant. 
 USER: Hi. Justin Green here. Can you book me a ticket from DEN to IAD?

ASSISTANT: Hello, how may I guide you? Sure, can I know your preferable dates?

USER: I would like to travel on 12/08 and 12/10.

ASSISTANT:  I found a flight 1010 of Frontier airlines matches with your preferences, can I proceed?

USER: Please book the ticket.

ASSISTANT: Your ticket is booked. Thank you.

USER: Thank you.