Hi, I am Brenda Wright.
user
Hello, how can I provide service to you?
assistant
I want to attend the Boston Hop-on Hop-off trolley tour which is famous for the city of Boston, MA - BOS. Can you help me to book a flight under price of 500?
user
Sure, can you please let me know your travelling dates?
assistant
My trip dates are 01/13 and recur on 01/15.
user
May I know from where would you like to start your journey?
assistant
I want to start from Washington DC - DCA.
user
 Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.
assistant
Ok, thank you for sharing the information.
user
Thank you for opting us.
assistant