Hello.
user
Hello. How can I assist you at this moment?
assistant
I need to travel from BOS to DCA, can you help me in that?
user
sure, I will help you with that. Can I have your travel dates please?
assistant
My trip dates are Nov 15 to 17.
user
Ok,  please let me know your preferable class.
assistant
I am comfortable in any class.
user
Do you  have any other specifications?
assistant
Please ensure that my depart time is in afternoon.
user
Can I have your good name please?
assistant
Brian Phillips here.
user
Sorry to inform you that no flight is available to you on your planned dates.
assistant
Ok, no issues. Thank you for the information.
user
Thank you for choosing us, have a good day.
assistant