Hello.
user
Hello, how can I be at your service?
assistant
I am Katherine Baker. Can you please book a flight ticket from ATL to DCA?
user
Sure, may I know your depart and return dates?
assistant
Sure, I need to travel on dates of Nov 26 and Nov 28.
user
Do you prefer either economy or business class?
assistant
I am ok with any class.
user
Please let me know if you have any specific depart and return time preference.
assistant
Yes, I would like to depart in the evening time only.
user
Sure, please wait for a while.
assistant
Sure, take your time.
user
Sorry, we don't have any flight which departs in the evening.
assistant
Oh! It is sad to hear. Anyway, thank you for your time.
user
Thank you for contacting us.
assistant
Most welcome.
user