Hello.
user
Hello. How may I help you?
assistant
I would like to meet my grand parents at Boston, please help me in booking a ticket from DCA to BOS.
user
Sure, can you please specify me your dates of travel?
assistant
My planned travel dates are on Nov 24 and Nov 26.
user
Please let me know if you have any class preference.
assistant
I prefer business for my trip.
user
 Is there any other requirements for this trip to met with, so that I can find a suitable flight for your journey?
assistant
I would like to return in the afternoon.
user
 To proceed further, can I have your name please?
assistant
My name is Rachel Hill.
user
We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.
assistant
Ok, no issues. Thank you for your information.
user
Welcome Rachel Hill.
assistant