Hi. Justin Green here. Can you book me a ticket from DEN to IAD?
user
Hello, how may I guide you? Sure, can I know your preferable dates?
assistant
I would like to travel on 12/08 and 12/10.
user
 I found a flight 1010 of Frontier airlines matches with your preferences, can I proceed?
assistant
Please book the ticket.
user
Your ticket is booked. Thank you.
assistant
Thank you.
user