Hello.
user
Hello, how may I help you?
assistant
I am Anthony Moore. I am planning to book a ticket from OAK to DEN. Can you please help me out?
user
Sure, please tell me your trip dates.
assistant
I would like  to travel on 12/24 an return on 12/26.
user
Sorry, no flight is there to reserve a seat for you.
assistant
That's fine. Thank you for your help.
user
Thank you for choosing us.
assistant