Hello, Timothy Roberts here.
user
Hello, how can I help you?
assistant
I have an invitation to attend a seminar in Detroit University as if now I would like to book a ticket. Can you please help me in booking a ticket with the price  below 500?
user
Sure, I am happy to help you. Can you please provide your travelling dates?
assistant
I intend to travel from 08/10 to 08/12.
user
Ok, please provide your source.
assistant
My journey starts from Boston, MA-BOS. Destination airport code is WA-SEA.
user
Ok, please wait for a while.
assistant
Sure.
user
Thank you for being patient, No flights were found with your given details.
assistant
Ok, no worries. Thanks for your glad service.
user
Thank you for choosing us.
assistant