Hi.
user
Hello. How can I help you at this moment?
assistant
 I want to book a flight on the route from BOS to SFO to meet my cousin, can you help me?
user
Sure, can you please provide your travelling dates?
assistant
Sure, my travel dates are from 02/16 to 02/18.
user
May I know your good name for documentation purpose?
assistant
My name is Ashley Allen.
user
Ashley Allen, there are no flights available on this route due to heavy bookings.
assistant
It's ok, no problem.
user
Thank you for contacting us.
assistant
Thank you for checking.
user