Hello,.
user
Hello, how may I help you?
assistant
I am David Hill. Can you book a direct flight for me to attend a emergency meeting in Detroit, DTW?
user
Sure Mr.Hill,  may I know your travelling dates?
assistant
My travelling dates are, depart on 12/26 and return on 12/28.
user
What is your Source airport code?
assistant
My source point is Denver, DEN.
user
Please wait, while I work on your ticket booking.
assistant
Sure.
user
We have a UA airline direct flight number 1023 and the cost is 200. Shall I proceed?
assistant
Ok, proceed.
user
Your booking has been done.
assistant
Thanks for your help.
user
Thanks for approaching us.
assistant