Hello, I am Davis Nelson.
user
Hello, how can I assist you?
assistant
I want to book a flight ticket to Boston, as I have an appointment with my family doctor. Please help me with a direct flight.
user
Sure, please let me know your  travelling dates.
assistant
My travelling dates are from 05/12 to 05/14.
user
Could you please let me know your airport codes?
assistant
I want to fly from JFK to BOS.
user
Sorry for the inconvenience, there are no flights with your requirement.
assistant
No issues, thank you.
user
Have a good day, hope we serve you best for the next time.
assistant