Hello.
user
Hello. How can I aid you?
assistant
 I am Ruth Nelson. I want to book a ticket from Denver, DEN to Houston, HOU.
user
 May I know your travel dates? Do you have any preference?
assistant
I will depart on 05/16 and return on 05/18. I want to stopover in between journey.
user
We found  a connecting flight Frontier with flight number 1002 and fare is 100.
assistant
Please reserve it.
user
 Your booking is done.
assistant
Thank you for booking my ticket.
user
Thank you for availing us.
assistant