Hello.
user
Hello. How may I help you?
assistant
I am Kathleen Young. I am planning to book a ticket from BOS to DCA. Can you please help me out?
user
Fine, let me know your trip dates too.
assistant
I am planning to travel on Dec 6 and return back on Dec 8.
user
 Is there any another specifications on your trip, so that I can arrange like that only.
assistant
Yes, my depart time is evening.
user
Sorry to inform you, there is no flight running on your preferable dates.
assistant
That's fine, thank you for your service.
user
Thanks for choosing us.
assistant